What effect does an author's use of long and complex sentence have on a story

Read these sentences from thr excerpt. what the most dreaded, that i most desired. what he most loved, i most hated. that which to him was a great evil, to be carefully shunned, was to me a great good, to be diligently sought; and the argument which he so warmly urged, against my learning to read, only served to inspire me with a desire and determination to learn. which statement best explains why the author uses parallel structure to advance his purpose?

The tankers are so large how did some crew members get from one point to another while on board

Why did martin luther king jr mention the ancient greek philosophersocrates in his letter