Read these excerpts.

Lincoln's "Gettysburg Address."

It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced.

Whitman's "O Captain! My Captain!".

Exult, O shores, and ring, O bells!
But I, with mournful tread,
Walk the deck my Captain lies,
Fallen cold and dead.

Which rhetorical appeal do both excerpts use?

logos: the use of logic to convince the audience
pathos: the use of emotional appeals to affect the audience’s feelings
brevity: writing or speaking that is short, brief, and to the point
ethos: the use of authority to persuade the audience to act the right way