The dust bowl and caused by dieing plants and pestisides
Answer:
Climate change, Availability of resources
Explanation:
1. Soon enough when the climate on the planet started to become more arid and become too hot, so humans started to migrate from Africa.
2. People started to move away to the places where resources were available.
Ramadan is your answer your welcome e
Ur answer is b
I literally just took the test
I believe the answer is that they traded with other regions. might have to double check. hope it helps.