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:

Stating the central idea upfront, limiting to one central idea, or defining unknown words do not actively develop the central idea. Connecting each speech section back to the central idea builds out and reinforces the core message, which is a key technique for developing it throughout the speech.

Answer:

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