Because they provoke the mind of your listener.
Asking questions during a presentation forces the audience to mentally participate.
We use the term ‘rhetorical question’ to mean that you don’t expect a reply. Even though the audience doesn’t answer, their minds are more active when they hear the question format.
- What’s the problem?
- How can we fix it?
- What’s the cost if we don’t do this?
- How many of you…?
- What have the Romans ever done for us?
- Have you ever wondered why…?
- Have you ever thought about…?
When you start an example with a rhetorical question, people can’t help thinking about it, which involves them more fully.