How did the last ice age affect human migration? a. it created land bridges where the ocean had once been. b. it required people to create new shelters. c. it required people to form larger communities. d. it required people to live closer together.

Its A i just took the quick check

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.