How does word choice support an author’s purpose?

In walt whitman's attitude toward death in "song of myself" differ from dickinson's attitude in "712: because i could not stop for death"?

Tom’s testimony has the effect of making scout feel sympathetic towards both tom and mayella. explain why she is sympathetic towards each of them.

What is implied in this sentence from mark twain's "the £1,000,000 bank-note"? i was puzzled, and wanted to discuss the matter a little further, but they didn't; so i took my leave, feeling hurt and insulted to be made the butt of what was apparently some kind of a practical joke, and yet obliged to put up with it, not being in circumstances to resent affronts from rich and strong folk.