Competition shapes communities because it is something that people must learn to help eachother out with
Answer:
Climate and slavery
Explanation: Slaves were the main reason that there was food before the end when Abraham was president. Climate and slavery can change how the crops were grown. I'd also say the geography was messed up then due to the climate. (sorry if wrong Q-Q)
Answer:
It can reduce carbon in the atmosphere.
Answer:
Energy can not be created or destoryed but converted.