A method of limiting a speech topic that involves repeatedly dividing the topic into smaller parts is referred to as which of the following?

The method described involves limiting a speech topic by breaking it down into smaller, more manageable components. This technique is known as a tree diagram. A tree diagram visually represents the relationships between different elements, allowing speakers to see how a broad topic can branch into various subtopics. By organizing information in this hierarchical structure, individuals can refine their focus and develop a clearer pathway for their speech.

Clustering refers to an idea-generation technique where concepts are grouped around a central theme, but it doesn't focus on a hierarchical breakdown like a tree diagram does. Search directories are tools for organizing information, often in the context of digital resources, rather than a method for developing speech topics. Brainstorming involves generating a wide range of ideas without the structured approach of dividing into smaller parts, meaning it lacks the specificity required for refining a speech topic in the same way that a tree diagram does.