The 26.4 percent increases in california caseload of autism spectrum disorder between 1992 in 2015 was the result of. a. dietary changes b. diagnostic changes c. advanced maternal age d. increased exposure to environmental toxins

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.