Answer:I think it is ecology
Explanation: because ecology study about the interaction between people and environment
A. its the reason why the sun is up longer in the summer.
Answer:
Digging of irrigation canals to irrigate their fields allowed for growing better and more crops. food surpluses allowed people to do other work than farm. this meant that they had enough food to survive in extra to trade with.
Explanation:
Hope this helped Mark BRAINLEST!!!!