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Encompassing nearly a third of the planet's land surface, forests

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Encompassing nearly a third of the planet's land surface, forests  [#permalink]

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New post 06 Jan 2020, 01:43
2
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

59% (01:28) correct 41% (01:54) wrong based on 118 sessions

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Encompassing nearly a third of the planet's land surface, forests perform a vital function in sustaining the conditions for human life in cities, maintaining air quality by ridding the atmosphere of excess carbon, and ensuring consistent global temperatures through the storage of greenhouse gases.


A)Encompassing nearly a third of the planet's land surface, forests perform a vital function in sustaining the conditions for human life in cities, maintaining
B)Encompassing nearly a third of the planet's land surface and performing a vital function in sustaining the condition for human life in cities, forests maintain
C)Forests encompass nearly a third of the planet's land surface and perform a vital function in sustaining conditions for human life in cities, and by maintaining
D)Forests encompass nearly a third of the planet's land surface, perform a vital function in sustaining the conditions for human life in cities, and maintain
E)Forests encompass nearly a third of the planet's land surface, performing a vital function in sustaining the conditions for human life in cities, and they maintain

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Encompassing nearly a third of the planet's land surface, forests  [#permalink]

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New post 09 Jan 2020, 00:30
Hema15 wrote:
why C is not correct


OFFICIAL EXPLANATION


The first thing we notice about this sentence should be the many verbs: "encompassing," "perform," "sustaining," "maintaining," and "ensuring." We will need to pay close attention to which verbs need to be in the same form.

Starting with (A), the main action is that "forests perform a vital function." "Sustaining," "maintaining," and "ensuring" are ways that the forests perform that function. It's a long sentence, but everything works as it is; let's see if any of our other options can do it better.
(B) uses "maintain," which doesn't match "ensuring,"
(C) only attaches "encompass" and "perform" as actions of the forests, leaving "maintaining" and "ensuring" without actors. Similarly,
(D) has "encompass," "perform," and "maintain" in the same form, but now "ensuring" has no actor.
(E) looks grammatical at first glance, but "they maintain" doesn't match "ensuring" in form.


The correct answer is Choice (A).
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Re: Encompassing nearly a third of the planet's land surface, forests  [#permalink]

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New post 09 Jan 2020, 00:40
Encompassing nearly a third of the planet's land surface, forests perform a vital function in sustaining the conditions for human life in cities, maintaining air quality by ridding the atmosphere of excess carbon, and ensuring consistent global temperatures through the storage of greenhouse gases.


A)Encompassing nearly a third of the planet's land surface, forests perform a vital function in sustaining the conditions for human life in cities, maintaining Starting -ing modifier correctly modifies the immediately following noun "forests". Present continuous forms of "maintain" and "sustain" are parallel with that of "ensure". No other obvious errors observed. Correct answer.

B)Encompassing nearly a third of the planet's land surface and performing a vital function in sustaining the condition for human life in cities, forests maintain There is a meaning shift in this option. The "vital function" performed by the forests is only "in sustaining the condition for human life in cities", whereas as per the question forests perform a vital function in three activities - "sustaining...", "maintaining..." and "ensuring....".

C)Forests encompass nearly a third of the planet's land surface and perform a vital function in sustaining conditions for human life in cities, and by maintaining The problem is with the usage of the word "by". In this context, "by" indicates something being used as an instrument / agency for doing another thing, which is not the meaning intended in the question. Additionally, the usage of "by" results in a sentence fragment.

D)Forests encompass nearly a third of the planet's land surface, perform a vital function in sustaining the conditions for human life in cities, and maintain There is a meaning shift in this answer option. As per the question forests perform a vital function in three activities whereas this option states the vital function to be only in "sustaining...". Also, this implies that forests "maintain..." by doing both of the following actions:

i) "ridding..." and
ii) "ensuring..."

while the question implies that forests "maintain..." by "ridding..." and "ensuring..." is a separate function.


E)Forests encompass nearly a third of the planet's land surface, performing a vital function in sustaining the conditions for human life in cities, and they maintain Same as (D)

Hope this helps.
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Re: Encompassing nearly a third of the planet's land surface, forests   [#permalink] 09 Jan 2020, 00:40

Encompassing nearly a third of the planet's land surface, forests

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