In which two situations is brainstorming for a paper most useful?

Yes! 

it helps you get your ideas down , after you are finished it makes it more clear to understand when you are writing a paper for school 

hope this helps :3 

For the first one) know the subject yes yes yes yes yes

As the boys sleep, military airplanes battle fiercely above the island. none of the boys sees the explosions and flashes in the clouds because the twins sam and eric, who were supposed to watch the signal fire, have fallen asleep. during the battle, a parachutist drifts down from the sky onto the island, dead.