In an explanatory essay, or any essay, the introductory paragraph introduces (hence it's name) the main idea, or what you are going to explain. The body paragraphs go into extreme detail of what the introductory paragraphs mentioned.
A) The president selects members of Congress.
Raoul Wallenburg resisted the Nazis by
Sheltering Jews in houses with swedish banners and flags
Giving Schutz passes to Jews
And by Providing clothes and food to Imprisoned Jews
What are I exactly asking for
: “The British used the profits from the sale of opium to purchase such Chinese luxury goods as porcelain, silk, and tea, which were in great demand. They tried to bribe the Chinese with the gifts.”
