Final answer:
Patrick Henry frequently uses rhetorical questions as a persuasive technique in his speech to engage the audience and emphasize his points.
Step-by-step explanation:
In Patrick Henry's speech, he frequently uses the persuasive technique of rhetorical questions. This style is characterized by asking questions to make a point rather than to receive an actual reply. Rhetorical questions are a powerful tool in speeches as they engage the audience and encourage them to think about the subject matter in a deeper way. This approach aligns with the practice of employing various rhetorical techniques which are designed to emphasize points and unify a text, a concept covered in Chapter 19 of the educational material. These techniques are part of the broader category of persuasion strategies that include appealing to logic (logos) by providing logical evidence such as facts and statistics.