During the speech introduction, the audience decides whether they are interested in the topic and the speaker. to build credibility, a speaker should establish his or he

qualifications

Explanation:

To attract the  audience and to make them interested in the topic of your speech, a speaker should give a first good impression at the speech introduction. There various ways to start a speech that would gin immediate attention like quotes, shocking statements, etc. Equally important is to establish a credential position by the speaker. He should tell his audience about the knowledge and credentials he holds to increase his credibility to speak on that topic.

trump is very poor. he does not look like a cheeto. he doesn't want to build a wall. (switch out he with trump)

on the first day of new student week, amber revealed to her roommate that she is a lesbian. this is an example of self-disclosure.