Answer:
The whole senctnece because the sentence starts with because.
-They are typically long documents and may have a table of contents.
D. it clearly connects ideas
Parallelism is when the same grammatical or sentence structure is used for a list of ideas or items. By using a similar grammatical structure the reader's brain automatically makes a connection between the ideas because of the similar structure. Caesar's famous line "I came. I saw. I conquered." is an example of parallelism. Each of the sentences has the format subject-past tense verb.
I think your essay is wonderful! You said your opinion in your first paragraph, then stated why in the next ones. Also the big if is pretty cool. Keep on writing essays and lapses will be corrected. Try to proofread and check the spelling so that it will be better.