The writers focus is broad and becomes what during the prewriting stage

When a writer focus is broad, he or she will likely focus on the idea that he or she wants to write or to partake in, in which this is at the prewriting stage. He or she will likely focus on his or her goals and to be able to focus on the specific thought or idea that he or she would likely focus.

sis. it's been a while since a read that and had that class so i can't answer for u

im not to sure