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08 Feb 2026, 20:00
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
71% (01:48) correct
29%
(02:01)
wrong
based on 210
sessions
History
Date
Time
Result
Not Attempted Yet
A chemical factory periodically produces toxic phosphates as runoff, which it drains into a small river. This river carries the phosphates to a stretch of grassland, where they are absorbed by wild sunflowers. The phosphate accumulates in various parts of the plant, without harming the plant, and breaks down into non-toxic elements as the plant decays. However, when a certain species of hummingbird feeds off of the phosphate carrying flowers, it dies. Thus, the chemical factory is putting hummingbirds in the region at risk.
To assess the argument, which of the following would be most helpful?
A. Whether fish in the phosphate carrying river are likely to die from the phosphates’ effects
B. Whether the flower of the phosphate carrying sunflower is as toxic as other parts of the sunflower plant
C. Whether the chemical factory produces as much toxic runoff as other chemical factories do
D. Whether the hummingbirds are feeding off of sunflowers growing in the stretch of grassland downstream from the chemical factory
E. Whether any other birds compete with the hummingbirds to feed off of the sunflowers growing near the river
To assess the argument, which of the following would be most helpful?
A. Whether fish in the phosphate carrying river are likely to die from the phosphates’ effects
B. Whether the flower of the phosphate carrying sunflower is as toxic as other parts of the sunflower plant
C. Whether the chemical factory produces as much toxic runoff as other chemical factories do
D. Whether the hummingbirds are feeding off of sunflowers growing in the stretch of grassland downstream from the chemical factory
E. Whether any other birds compete with the hummingbirds to feed off of the sunflowers growing near the river
09 Feb 2026, 11:32
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ExpertsGlobal5
A chemical factory usually produces toxic phosphate as runoff, which drains into a small river. The small river then carries the phosphate into stretch of grassland, the wild sunflower at these grasslands absorb these phosphates.
The phosphates accumulates in various parts of the plant, without harming the plant the phosphate gets breaks down to non toxic elements, as the plants decay. However, when a certain species of hummingbird feeds off the phosphate carrying flowers, it has died.
Thus, the chemical factory is putting hummingbirds life at risk.
We need to evaluate is the conclusion.
A. Whether fish in the phosphate carrying river are likely to die from the phosphates’ effects.
The context is not whether the fish drank the water from these runoff, but does the humming bird really feed on the sunflower plants that have grown in the grasslands. Hence, incorrect.
B. Whether the flower of the phosphate carrying sunflower is as toxic as other parts of the sunflower plant.
Only when the plant decays, the toxic phosphates gets converted into non toxic substances. The question is not to debate on the toxicity levels of sunflower vs the toxicity of other parts of sunflower. Hence, Wrong.
C. Whether the chemical factory produces as much toxic runoff as other chemical factories do.
This option shifts the comparison between chemical factory which releases the runoff, and other chemical factories. We are not concerned about the chemical factories in other regions, or other time frames. Hence, wrong.
D. Whether the hummingbirds are feeding off of sunflowers growing in the stretch of grassland downstream from the chemical factory.
This is a strong evaluator, this raises the question whether the humming birds are feeding off the sunflowers from these grasslands, where the phosphate runoff has reached. If the humming birds have fed these sunflowers, then we can conclude the deaths are due to sunflowers.
If the humming birds have not been fed these sunflowers, then the death which have happened cannot be attributed to these chemical factories. Hence, correct answer.
E. Whether any other birds compete with the hummingbirds to feed off of the sunflowers growing near the river.
This option speaks about the food chain competence that has occured in feeding these sunflower plants. This is completely out of scope option. We are not bothered about the food competition happening for sunflowers. Hence, Wrong.
Option D
10 Feb 2026, 05:25
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Although D is understandably right.
What raised the doubts wrt option E was if any other birds compete with the hummingbird to feed off of the sunflower, it should also die from the toxic substance.
So that would also be helpful to find out the truth
What raised the doubts wrt option E was if any other birds compete with the hummingbird to feed off of the sunflower, it should also die from the toxic substance.
So that would also be helpful to find out the truth
