Question

which is a technique speakers use to develop their central ideas in speeches? they explain the meaning of unknown words to the audience. they explicitly state the central idea in the beginning of the speech. they connect each section of a speech back to the central idea. they ensure there is only one central idea in the speech.

Explanation:

Connecting each section of a speech back to the central idea helps in developing and reinforcing it throughout the speech. Explaining unknown words is more about clarity of language, stating the central idea at the start is an introduction - related action, and ensuring one central idea is about speech - structuring rather than development.

Answer:

They connect each section of a speech back to the central idea.