Question

how does the passionate tone adopted by settainte (satanta) within the speech \my heart is bursting\ most hel achieve his purpose?
it strengthens his ability to persuade through emotions.
it strengthens his ability to persuade through credibility.
it decreases his ability to persuade using logical ideas.
it decreases his ability to persuade using his reputation.

Explanation:

A passionate tone in a speech is related to appealing to the audience's emotions (pathos in rhetoric). Credibility (ethos) is about trustworthiness/reputation, and logical ideas (logos) are about reasoning. A passionate tone doesn't decrease persuasive ability via logic or reputation, and it's not about credibility. So the passionate tone strengthens persuasion through emotions.

Answer:

A. It strengthens his ability to persuade through emotions.