The single most important demographic trend in the united states is the

Why would be a good national slogan that people could identify with and rally behind

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.

Analyze: according to adam smith, why is competition a good thing? explain.