During the speech, the audience was quite confused about the focus of the speech because the speaker addressed so many diverse ideas. The speaker probably should have devoted more attention to . Establishing common ground. Establishing credibility. Establishing a thesis. Establishing primacy and recency.

establishing a thesis

Explanation:

A thesis statement appears at the end of the introductory paragraph of a paper, and offers a concise summary of the main point or claim of the essay, research paper, etc. It is usually expressed in one sentence, and the statement may be reiterated elsewhere. It contains the topic and the controlling idea