How do I talk to gorl without being nervous

Americans often refer to a country that is not the united states as a

1. describe the concept of the unitary executive. discuss whether this concept is practical.

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.