What does a cause-and-effect chain show?

Which type of learning occurs when you observe how other people act?

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.

The patriot act made it easier for law enforcement agencies to conduct surveillance under certain circumstances true or false