A friend is telling you that they tend to drink more at parties than they do at home. You ask about why and they tell you that though they enjoy their fifth and sixth drinks the same regardless of where they are. Based on the fact that it is free at the party and they have to pay to replace it at home, you can translate the statement into a verification of

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.