Hi! :)
Answer: antithesis
Antithesis is being used by JFK ie by turning the question around of what your country can do for you to what you can do for your country he grabs the interest of the audience by coming up with the opposite meaning.
I believe the first one is too broad.
D uses a gerund as the subject. It uses “traveling” as the noun. Since traveling is a verb used as a noun in this case, it is a gerund
Some horror movies use science fiction in them, at many times they each have suspense, they each use an immense amount of imagination.
