Which of these events is an example of a part of the rock cycle? A
Water evaporates and rises into the atmosphere.
B
Shale wears away over time due to weathering.
C
Rain falls from clouds.
D
Trees release oxygen into the atmosphere.

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.