How does studying ww1 us understand the causes of modern conflict?

In a citizens elect the president as head of government separately from the legislature. question 1 options: parliamentary democracy communist state presidential democracy autocratic state

Sociology is best described as the systematic study of

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.