Which of the following is NOT a type of speech commonly identified in public speaking?

In the context of public speaking, the common types of speeches recognized are informative, persuasive, and demonstrative. Each of these categories serves a specific purpose in communication.

An informative speech aims to educate the audience about a particular topic, providing them with knowledge and insights. A persuasive speech, on the other hand, is designed to convince the audience to accept a specific viewpoint or to take a certain action. Demonstrative speeches involve showing the audience how to do something through demonstration, often combining explanation with a practical application.

While "descriptive" might sound like it could describe a way of delivering a speech, it is not classified as a standard type of speech in the field of public speaking. Instead, descriptive language may be a technique used within informative or persuasive speeches to enhance engagement or provide clarity.

Thus, identifying "descriptive" as the option that is not commonly recognized as a type of speech aligns accurately with public speaking terminology.