Final answer:
The speaker poses rhetorical questions throughout the speech to engage the audience and encourage critical thinking. These questions are effective in prompting reflection, generating curiosity, and stimulating further discussion and analysis.
Step-by-step explanation:
The speaker's questions pose a rhetorical strategy known as rhetorical questions. These are questions that are asked not to elicit an answer, but to make a point or engage the audience. By using rhetorical questions, the speaker encourages the audience to think critically and become actively involved in the speech. The effectiveness of these questions lies in their ability to prompt reflection, generate curiosity, and stimulate further discussion and analysis from the audience.