When people ban together in large groups, wear uniforms, don masks, call themselves by numbers rather than names, or otherwise engage in actions that make them feel anonymous, they are said to be engaging in

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.