A gorge has a river flowing through it. During most of the year the temperature at the gorge goes above and below freezing every day. What most likely will cause the surface of the gorge to change over time?

The correct answer is weathering due to frost wedging. I took the test, I know that this is correct. I chose the other answer, but it was incorrect. Trust me! :D

Hope this helps ma dude!!

b) trade is easy because of the direct line between their major ports. bilateral trade reached 89,6 thousand million.

sumerians were polytheistic, meaning they believed in many different gods. so, the best answer is c.