The answer to this question is:
A. Barley and wheat were both civilizations' main crops
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The city closest to 35N-105w is Santa Rosa
The answer is D. heat flow and the movement of material inside the Earth
That is the only really obvious answer since it's basically talking about plate tectonics.
1.weathered materials from rocks and transported to the beach through wind and rivers
2.from rocks weathering and eroding over thousands and millions of years.
