Which of the following best describes the function of the thesis statement in a speech?

The thesis statement serves a vital role in a speech by clearly conveying the main ideas the speaker intends to address. It acts as a guide for both the speaker and the audience, outlining the central argument or purpose of the speech. By succinctly summarizing the key points, it sets the expectations for what is to come, ensuring that the audience remains focused on the primary message throughout the delivery.

In contrast to focusing solely on entertaining or informing, which can be elements of a speech but do not encompass its overall structure, the thesis statement specifically emphasizes explaining the speech's main ideas. Additionally, while it might briefly appear at the conclusion, it primarily functions to introduce and clarify the topic rather than wrapping up the discussion.