Although fruit can no longer grow once it is picked, it continues for some time to respire, taking in oxygen and giving off carbon dioxide, ( similar to the way human beings breathe.)
Why is this wrong ?
E) just as human beings do when they breathe. - this is right, why?
I guess human beings respire when they breathe.
The part in the parenthesis is not technically wrong, but it creates an awkward construction. If
it read "similar to the way human beings do" instead of "similar to the way human beings breathe" it would be ok. However, the verb is "respire" in the stimulus, so to invoke the word "breathe" is sort of awkward.
(E) addresses this in a roundabout way by having two verbs in the clause: "do" and "breathe." "Do" is the parallel to the breathing of the fruit, and "when they breathe" is just an add-on to make the sentence sound more crisp. These last 3 words are not actually critical to the grammar.