I think the answer is When a solar flare erupts, it has the force of a hundred million hydrogen bombs. This is the answer because a bomb is dangerous and a solar flare is probably a type of fire thing cause by the sun so that makes the most sense and provides an example of a violent type of space weather.
Answer: i believe the answer is aggrivating
Explanation:
Kennedy was appealing to the emotion of the crowd. He specifically was calling on their pride
and patriotism to serve their country.
He was telling them not for their country to do something for them but
for them to act and contribute to the betterment of their country.