Answer:
The correct answer is emotion.
Step-by-step explanation:
In the above passage, John F. Kennedy tries to relate to the public emotionally so he can gather their trust. The public tends to react more to emotional statements rather than rational ones.
There are several words and sentences used by him that point towards emotions used as rhetorical device for example,
- We welcome to the ranks of the free
- We shall always hope to find them strongly supporting their own freedom
- Those who foolishly sought power by riding the back of the tiger ended up inside.