C. andesite. hope this helped!
A broad, marshy, triangular area of land formed by silt deposits at the mouth of a river.
I took notes about this a long time ago
The poles receive more direct sunshine so it has to do with the angle that the light hits. The Earth is round and when light hits it the light wraps around the earth. At the poles the light is very stretched and at the equator it is very direct hence it is hotter at the poles.
Hydro=water therefore hydroelectric means to use water for power. WA & Oregon are closer to water than the great planes. the answer is yes.
