The third one:
“I can’t wait to be old enough to vote,” said Felipe,
Answer:
word's that give meaning
Explanation:
Giving an audience an exaggerated, obvious approach on the point you want to emphasize. (Try to convey them about the point)
The used rhetorical device is Hyperbole.
Saying that something is a billion times better is hyperbole because it is not really that much better, you would just be over exaggerating.