Aform of speech that is used to clarify, describe, demonstrate, and/or explain is referred to as informative persuasive entertaining professional

The correct answer is A. Informative

Explanation:

In communication, an informative speech is a type of speech delivered to provide broad and precise information about a specific topic or issue. Due to this, this form of speech uses clarification, exemplification, explanation, etc to provide all information required about the topic of the speech. For example, if you deliver a speech about global warming you need to explain what is global warming, its causes, effects, and even possible solutions so your audience can understand from a holistic perspective this topic. According to this, it is informative speech the one that is used to clarify, describe, etc.