In phase 2 of a demographic transition, there is in the crude birth rate and in the crude death rate.

What was the social class pyramid during the civil war?

Which statement is a good description of a model? a) models are a description of nature based only on one or two variables. b) models are testable ideas but they are not very to most people. c) models are a description of nature that predicts more accurately than real events. d) models are an approximiation of a real system that omits all but most essential variables in a system.

According to the law of supply, suppliers want to sell their product at prices