Final answer:
Kennedy's use of rhetoric, including parallelism and paternalism, helps to advance his argument and engage the audience.
Step-by-step explanation:
Kennedy's use of rhetoric advances his argument in several ways. He employs parallelism and repetition, such as in the famous line 'Ask not what your country can do for you; ask what you can do for your country,' to emphasize his message and make it memorable. This rhetorical device helps to engage the audience and create a sense of unity and shared responsibility. Additionally, Kennedy's use of paternalism, by calling upon citizens to serve their country and work together for the greater good, appeals to the sense of duty and loyalty.