Answer:
Ethos is built through syntax.
Step-by-step explanation:
Ethos is on of the three "ingredients of persuasion" mentioned by Aristotle. The others are pathos and logos. it represents an ethical appeal.
Ethos confirms the credibility of the speaker and listeners are persuaded by his argument; it is very important to remark that ethos is built by how the speaker chooses his own words or phrases and how they are told to the audience, which is, basically, the definition of syntax.