The use of specialized language in a speech should be based upon which factor?

The use of specialized language in a speech should be based on audience analysis. This is crucial because understanding the audience's background, knowledge level, and familiarity with specific terminology is essential for effective communication. If a speaker uses jargon or technical language that the audience does not understand, the message can become obscured, leading to confusion or disengagement.

By conducting a thorough audience analysis, the speaker can determine the appropriate level of complexity and the kind of language that will resonate with the audience. This helps ensure that the content is accessible, relatable, and impactful, thereby facilitating better comprehension and engagement during the presentation. In contrast, focusing solely on reasoning, speaker credibility, or supporting materials does not address the necessity of aligning with the audience's understanding when delivering a message.