Is the term used to describe the physical, emotional, cognitive, and behavioral responses to events that are threatening or challenging.

Abrief, "first-step" presentation of a work to be completed is called a

When zhang qin went to explore west, he brought back stories 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.