When there is only business or person who sells a good or service

Where did women first gain economic freedom

What are the relation of community dynamics and community action to applied social sciences?

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.