How does the author persuade readers in this essay?what is he trying to communicate to the readers?​

How does this paragraph develop the characters in the dialogue?

King shifts the idea of being "extremist" from something negative to something positive. how does the concluding sentence directly address his audience. ( lines 384 - 410, letter to birmingham)

Explain the effect of the rhetorical questions for the below paragraph. "i pinched myself: was i still alive? was i awake? how was it possible that men, women, and children were being burned and that the world kept silent? no. all this could not be real. a nightmare soon i would wake up with a start, my heart pounding, and find that i was back in the room of my childhood, with my "