Question

A writer is using parallel structure when

the addition of multiple words confuses their meaning
inanimate objects are given human qualities or personalities
the main idea is repeated with a variety of word choices
multiple ideas are expressed using the same pattern and form

I think it's A.

Answer 1

Actually, it is D. Parallel structure (also called parallelism) is the repetition of a chosen grammatical form within a sentence. By making each compared item or idea in your sentence follow the same grammatical pattern, you create a parallel construction. So, you express multiple ideas using the same grammatical pattern

Answer 2

This is why we second guess ourselves.
Thanks.

Answer 3

Exactly why we second guess ourselves
And no problem