Final answer:
Roosevelt's rhetorical appeals aimed to highlight the dangers of inaction, evoke a historical sense of duty towards democracy, and persuade Americans that their support would ensure victory and protect fundamental freedoms.
Step-by-step explanation:
The rhetorical appeals used in Roosevelt's "Four Freedoms Speech" were intended to have several effects. Option 1 was to describe for Americans the potential dangers of not joining in the war, emphasizing the global impact of a potential loss of freedoms and democracy if the Axis powers were victorious. Option 2 was to remind Americans of their historical pursuit of democracy and their legacy of standing up for such values, fostering a sense of continuity and duty towards democratic ideals. Lastly, Option 3 was to persuade Americans that support for the war would lead to victory and the preservation of the cherished freedoms Roosevelt outlined. Although not mentioned, it should be noted that Roosevelt also intended to boost morale and unity among Americans by reinforcing the idea that they were fighting for noble objectives that transcended national boundaries.