This is a deep gorge carved out by running water over millions of years. what is this landform called?

What was the social class pyramid during the civil war?

The controlled use of fire by hominids: (a) limited the expansion of hominids into certain environments, such as dry grasslands. (b) decreased the amount of food energy available in the hominid diet. (c) contributed to geographical expansion and food production techniques in positive ways. (d) has been shown to contribute little to the digestive process of hominids.

From where do ocean waves obtain their energy