She was only three but already had a temper. her favorite outburst was to stomp her foot. so her mother made her stomp and stomp and stomp until there was no more stomping left in her. this mother was using to alter her daughter's behavior.

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.