What effect is achieved by using a series of questions in this speech

Hypophora is a figure of speech in which a writer raises a question, and then immediately provides an answer to that question. Commonly, a question is asked in the first paragraph, and then the paragraph is used to answer the question. It is also known as “antipophora,” or “anthypophora.”

Hope this helps!

idk tbh because i'm just getting points.

every person should make it a priority to serve at least two hours per week.

it's an extremely important civic responsibility that is invaluable to citizens most in need is the correct one