The answer is B. seasonal winds
B. Washington DC(short for Districtof Colombia).
C. I learned this in 6th grade. The desert is dry, and has very low resources.
After studying the photograph above, the chemical formula that will show the composition for the most common mineral that will be found in the rock unit 3 is CaMg (CO3)2. I can't seem to make my keyboard make the numbers smaller. So 3 and 2 should be very small. Sorry about that. I tried to paste the numbers, but it wouldn't let me.