We need to give examples here so that would narrow down to B and E.
E is better because IIism and correct meaning

What is wrong with B here?

Is 'or also' correct?

gmat_perfect wrote:The ecosystems of barrier islands are extremely vulnerable--whether from natural processes like shoreline recession, rising sea levels, and destructive hurricanes, or the ever-increasing pressures of development.

(A) whether from natural processes like shoreline recession, rising sea levels, and destructive hurricanes, or
(B) whether from natural processes such as shoreline recession, rising sea levels, and destructive hurricanes, or also
(C) to processes that are natural like shoreline recession, rising sea levels, and destructive hurricanes, and also
(D) to processes that are natural ones like shoreline recession, rising sea levels, and destructive hurricanes, as well as to
(E) to natural processes such as shoreline recession, rising sea levels, and destructive hurricanes, as well as to

[spoiler]OA: E[/spoiler]

Final solution at one place:

Important: The purpose of this post (and all the other posts by me) is to give a complete solution to all GMAT-Prep Verbal questions at one place. Sometimes students have to wade through dozens of posts to get to the final answer. My posts will give one complete and crisp solution required to arrive at the correct answer by eliminating the wrong one. Some of the content in these posts may have been taken from various other sources (discussion forums).

The ecosystems of barrier islands are extremely vulnerable-whether from natural processes like shoreline recession, rising sea levels, and destructive hurricanes, or the ever-increasing pressures of development.
(A) whether from natural processes like shoreline recession, rising sea levels, and destructive hurricanes, or
(B) whether from natural processes such as shoreline recession, rising sea levels, and destructive hurricanes, or also
(C) to processes that are natural like shoreline recession, rising sea levels, and destructive hurricanes, and also
(D) to processes that are natural ones like shoreline recession, rising sea levels, and destructive hurricanes, as well as to
(E) to natural processes such as shoreline recession, rising sea levels, and destructive hurricanes, as well as to

Between 'like' and 'such as', the GMAT always prefers 'such as'. This eliminates A, C, and D.

Also, the correct idiom is 'vulnerable to' ... this eliminates B.

Ans. E

@Sandeep: Is "whether from" not unidiomatic?

Please help.

Thanks.