(A) ethos, an appeal based on the speaker's credibility
Explanation:
Persuasion techniques such as ethos, pathos, and logos can help you persuade others of the validity of your claims. An ethos is a term that refers to a person's character and makes a moral argument. An appeal to logic is referred to as a "logos" argument. Emotional appeal is a term for pathos, which can be translated as "sadness."
