The arrows on either side of the fault represent _. A
Volcanic eruptions

B
The relative movement of tectonic plates

C
Rock formations

D
The relative movement of air masses

Experiment to investigate effect of medication on levels of stress in males and females. dependant variable?

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.

Which of the following is the best interpretation of this quotation?