Which of the following is NOT a type of informative speech?

The correct answer is C, as persuasive speeches aim to influence the audience's beliefs or actions, making them distinct from informative speeches. Informative speeches are designed to educate the audience about a specific topic, providing facts, insights, and explanations without attempting to sway opinions or encourage action.

On the other hand, explanatory, descriptive, and demonstrative speeches fall under the umbrella of informative speeches. Explanatory speeches clarify or elaborate on a concept, descriptive speeches paint a vivid picture of a subject or event, and demonstrative speeches provide a step-by-step guide on how to do something. Each of these types is focused on imparting knowledge rather than persuading the audience.