List two reasons why public opinion is important in a democracy

Which of the following items would serve as a primary source for a historian studiying the american 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.

Which of the following is a constitutional power that the president shares with the senate?