Two company divisions produce completely different products but both must seek funding from the corporate office for a capital expansion project. The relationship between these two divisions would be best described as interdependence.

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.