Which three actions does a good writer take?

How does the poem's mood and tone change in each of these stages of “o captain! my captain! ” by walt whitman? (i need an answer asap )

The date of a business letter is included in the greeting. heading. inside address. margin.

What effect is created by the plaque posted on the gate at the entrance to the family's home in nadine gordimer's "once upon a time"? the words written on the plaque offer readers a foreshadowing of the story's outcome without revealing the actual conclusion, the author's use of flashback allows readers to understand what is at the heart of the issues of encroachment in the suburban neighborhood the repetition of the words written on the plaque presents an oxymoron because readers already sense that the plaque has been ineffective in warding off intruders. the author introduces a paradox in which readers are presented with a warning notice when no actual infraction has taken place.