What type of content is essential to support the main arguments in a speech?

Compelling supporting materials are essential in a speech because they provide the evidence and context necessary to bolster the main arguments. These materials can include statistics, facts, expert testimonials, real-life examples, and relevant stories. By using such supporting content, a speaker can effectively convince the audience of their message's validity and relevance.

In contrast, focusing exclusively on personal anecdotes may not provide a well-rounded argument if those anecdotes do not connect to the broader topic. Technical jargon can alienate or confuse the audience if they are not familiar with the terms, detracting from the speaker's ability to communicate clearly. Lastly, relying on unverified statistics can undermine credibility and weaken the argument, as the audience may question the accuracy and reliability of the information presented. Therefore, compelling supporting materials create a strong foundation that enhances the persuasiveness and impact of the speech.