Past assessments of the Brazilian rain forest have used

Hi,
Past assessments of the Brazilian rain forest have used satellite images to tally deforested areas, where farmers and ranchers have clear-cut and burned all the trees, but such work has not addressed either logging, which is the removal of only selected trees, as well as surface fires, burning down individual trees but do not denude the forest.



POE:

A. which is the removal of only selected trees, as well as surface fires, burning: Incorrect.
1. The correct idiom is “either… or…”. This choice uses incorrect idiom “either… as well as…”.
2. Conjunction “but” connects two parallel entities. What follows “but” here “do not denude”, a verb phase. This means the subject “surface fires” should have another verb that cab be contrasted by the use of “but”. But there is no other verb before “but”. “burning” is verb-ing modifier that modifies “surface fires”.
3. Also what follows “either…” should be parallel to what follows “or…”. “is removal of…” is not parallel to “burning down…”.

B. which removes only selected trees, or surface fires that burn: Correct answer.
1. This choice uses the correct idiom “either… or…”.
2. There is a verb before “but” now that results in correct grammatical structure of the sentence. “… that burn… but do not denude…”.
3. “which removes…” is parallel to “that burn…”. Notice that both “which” and “that” are relative pronouns. Entities must be parallel to the extent where they communicate the logical meaning of the sentence by maintaining parallel grammatical structure.

C. which removes only selected trees, along with surface fires that burn: Incorrect. This choice uses incorrect idiom “either… along with…”.

D. removing only selected trees, or surface fires, burning: Incorrect. Same ungrammatical sentence structure issue as in choice A (point#2).

E. removing only selected trees, as well as surface fires that burn: Incorrect. This choice uses the same incorrect idiom as does choice A.



1. Idioms must always be correctly worded.
2. Conjunctions must be used to construct grammatical sentences.
3. Entities in the list must be logically as well as grammatically parallel.

The concepts tested in this sentence have been covered in e-gmat concepts:
1. Level 1 – Sentence Structure Part I & II. (These concepts feature in Level 1 Preview Concepts that are available in Free Trial. Just register and learn.)
2. Level 1 – Idioms – Standard Expressions
3. Level 3 – Parallelism – Identify & Correct.
4. Level 4 – Parallelism – Helpful Tips

Thanks.
Shraddha