I believe the answer is: Conservation
According to krech, saving for conservation is necessary in order to make sure that the resources that exist in our environment do not depleted faster more than it can replenished. Without this, a certain type of resources might come to extinction.<span />
Dictatorship I think Im not sure
The americans ended up getting new territories and we paid mexico for the territories and dont forget california was one of the territories and the California gold rush was huge to us
D. when the US was expanding its territory, the Native Americans were kicked out of their lands and were sent to camps and toward deserted lands
There was too many economic problems between the rulers so they split
