Answer:
The climate in North China is dry & hot
The declaration of independence
I'm guessing that they fought against forces, like the people trying to steal land so they could have enough space to live, farm, and hunt.
I also think that the Native American could have traded or given valuable items to the people who were trying to take their land in exchange for the Natives to keep their land.
C. rises; decreases
If the price of a substitute good rises, the demand for a good decreases.