Ten-year-old jose finds that he needs his friend, richard, to talk to in order to know whether jose's feelings about his own brothers and sisters are normal. which friendship function does richard provide in this case?

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.