Answer:
gravity
Explanation:
streams erode dirt and rocks, transport the sediment, and redeposit it in new locations shaping the earths surface into a system of stream valleys. streams now flow downhill due to the force of gravity
Humans have once settled in areas that are now covered in glaciers.
The Pangaea Earthquake.
The Green House Effect.
Answer:
The answer is D. Panama Canal.
Answer:
whether it was a planet or not
Explanation:
Answer: A) switch from crops to livestock.
Hope this helps, sorry if I got this wrong.
