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.

D) Models are an approximation of a real system that omits all but most essential variables in a system.

Explanation: Since models try to represent a reality in nature, they have to try to include the most relevant variables, otherwise, they will be hard to manipulate and they couldn't explain any system in nature.

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