Question

Read the two excerpts from Dr. King's speech. We must come to see that no individual can live alone: no nation can live alone. *** In a real sense, we must all learn to live together as brothers, or we will all perish together as fools. What technique makes both excerpts effective

Answer 1

The technique makes both excerpts effective is an appeal to logic.
Logos is the logic, reasoning and argument, or simulation of it, in a persuasive appeal.
Logos is a persuasive technique that tries to persuade an audience using logical arguments and supporting evidence.