What is a benefit of international trade? a. national security b. reduction in unemployment for certain industries c. higher standards of living d. protection of native infant industries?

How were the economies of the northern and southern states different? how ere they the same? what factors led them to develop differently?

What is the relationship between surface winds in the northern and southern hemisphere?

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.