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12 Aug 2026, 03:18
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Researchers studying deforestation in a tropical region found that areas where local farming communities practiced rotational agriculture — leaving fields fallow for at least three years between planting cycles — retained significantly more native tree species than areas under continuous cultivation. The researchers concluded that promoting rotational agriculture across the region would meaningfully slow the overall rate of deforestation.
The conclusion above depends on which of the following assumptions?
(A) Rotational agriculture does not require farmers to clear additional land during fallow periods to compensate for lost agricultural output.
(B) The native tree species retained in rotationally farmed areas are the same species most vulnerable to deforestation elsewhere in the region.
(C) Local farming communities that practice rotational agriculture do so primarily for environmental reasons rather than economic ones.
(D) Continuous cultivation is the single largest driver of deforestation in the tropical region studied.
(E) Researchers have previously studied rotational agriculture in other tropical regions with similar results.
The conclusion above depends on which of the following assumptions?
(A) Rotational agriculture does not require farmers to clear additional land during fallow periods to compensate for lost agricultural output.
(B) The native tree species retained in rotationally farmed areas are the same species most vulnerable to deforestation elsewhere in the region.
(C) Local farming communities that practice rotational agriculture do so primarily for environmental reasons rather than economic ones.
(D) Continuous cultivation is the single largest driver of deforestation in the tropical region studied.
(E) Researchers have previously studied rotational agriculture in other tropical regions with similar results.
12 Aug 2026, 12:00
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Researchers studying deforestation in a tropical region found that areas where local farming communities practiced rotational agriculture, leaving fields fallow for at least three years between planting cycles, retained significantly more native tree species than areas under continuous cultivation. The researchers concluded that promoting rotational agriculture across the region would meaningfully slow the overall rate of deforestation.
The conclusion above depends on which of the following assumptions?
The argument says rotational agriculture preserves more native tree species than continuous cultivation. From that, it concludes that promoting rotational agriculture would slow overall deforestation. The key assumption is that rotational agriculture will not force farmers to clear new land elsewhere while old fields lie fallow.
(A) Rotational agriculture does not require farmers to clear additional land during fallow periods to compensate for lost agricultural output.
This is correct. If farmers must clear additional land while other fields are left fallow, then rotational agriculture might preserve trees in one place but cause deforestation elsewhere. The argument depends on ruling out that problem.
(B) The native tree species retained in rotationally farmed areas are the same species most vulnerable to deforestation elsewhere in the region.
This is not required. The conclusion is about slowing overall deforestation, not protecting specific tree species.
(C) Local farming communities that practice rotational agriculture do so primarily for environmental reasons rather than economic ones.
This is irrelevant. The reason farmers practice rotational agriculture does not determine whether the method slows deforestation.
(D) Continuous cultivation is the single largest driver of deforestation in the tropical region studied.
This is too strong. Continuous cultivation does not have to be the single largest driver. Rotational agriculture could still meaningfully slow deforestation if continuous cultivation is one important driver.
(E) Researchers have previously studied rotational agriculture in other tropical regions with similar results.
This is not required. The argument can depend on evidence from this region without needing similar studies elsewhere.
Answer: (A)
The conclusion above depends on which of the following assumptions?
The argument says rotational agriculture preserves more native tree species than continuous cultivation. From that, it concludes that promoting rotational agriculture would slow overall deforestation. The key assumption is that rotational agriculture will not force farmers to clear new land elsewhere while old fields lie fallow.
(A) Rotational agriculture does not require farmers to clear additional land during fallow periods to compensate for lost agricultural output.
This is correct. If farmers must clear additional land while other fields are left fallow, then rotational agriculture might preserve trees in one place but cause deforestation elsewhere. The argument depends on ruling out that problem.
(B) The native tree species retained in rotationally farmed areas are the same species most vulnerable to deforestation elsewhere in the region.
This is not required. The conclusion is about slowing overall deforestation, not protecting specific tree species.
(C) Local farming communities that practice rotational agriculture do so primarily for environmental reasons rather than economic ones.
This is irrelevant. The reason farmers practice rotational agriculture does not determine whether the method slows deforestation.
(D) Continuous cultivation is the single largest driver of deforestation in the tropical region studied.
This is too strong. Continuous cultivation does not have to be the single largest driver. Rotational agriculture could still meaningfully slow deforestation if continuous cultivation is one important driver.
(E) Researchers have previously studied rotational agriculture in other tropical regions with similar results.
This is not required. The argument can depend on evidence from this region without needing similar studies elsewhere.
Answer: (A)
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