Please help, any unnecessary answers will be reported.

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.

Music the height of a wave or the amount of the wave carries is the amplitude. a. air b. nodes c. speed d. energy

1. create a hypothetical story of how a violent conflict arose between two groups. in your story, include examples of how in-group bias, out-group homogeneity, out-group derogation, and scapegoat theory lead toward violence between groups. be sure to label each term where it occurs in your story (20 points)