In a debate, when a speaker uses ethos to persuade the audience, the speaker is using tone to support the claim. building credibility to support the claim. appealing to emotions to support the claim. using logical reasoning to support the claim.

In rhetoric, ethos is one of the modes of persuasion or components of an argument, characterized by Aristotle. The ethos is the moral component, character or authority of the speaker to influence the audience. The other components are logos, use of reasoning, and pathos, use of emotion.

So the second question is correct. The speaker is building credibility to support the claim.

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answer is b.

  it is always the best policy to have good communication and good relations between individuals and, specially, between leaders of the countries. for this purpose, among others, there is a common place, the united nations, where the representants can present his and learn about the other country's policies.