What is one way to appeal to ethos?
a. by asserting that there is no other way to look at the issue.
b. by showing you are knowledgeable about an issue.
c by showing the emotional aspect of an issue and evoking pitty.
d. by quoting your friends who support your point of view.

an expression designed to call something to mind without mentioning it explicitly; an indirect or passing reference.

it is the background information on the characters and setting explained at the beginning of the story. the exposition will often have information about events that happened before the story began. the exposition is often the very first part of the plot.