1, they are thoughtful, but poor
2, they knew what each other cherished and had gotten each other a gift to suit their passions, wisdom is the quality of having experience, knowledge, and good judgment
3, Jim got Della a set of hair brushes by selling his watch, and Della sold her hair to afford a chain for Jim’s watch, neither of them can use the gift for they had sold them to get the gifts.
Jefferson beilives it is the right to overthrow their government
To write a persuasive essay, you need an argument. Your primary reason for wanting to go somewhere on summer vacation would be called your "thesis." Put your thesis in your introduction, and then elaborate on it. You basically need three reasons, one for each body paragraph, and conclude your argument in the final paragraph, the conclusion. Hope that helps!
The main purpose of subheadings are:
They stand out because of their size and attract attention.
The scanner will stop to read them and continue scanning until the next subhead which they'll then read.