Help ASAP :D

Me asap worth brainlieist and 50 points

Recently, there has been pressure to loosen clean air standards. use economic arguments to support or oppose this proposed action.

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.