Early humans most likely experienced which of the following changes in climate and environment? select all that apply

Analyze why south america is a place of ethnic diversity.

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.

Humans are the only animals capable of communication