Why do Brazil, Cuba, and Mexico have easy access to international trade? A.
They all have large populations of foreign citizens.

B.
They all have easy access to raw materials.

C.
They all have ports along the Atlantic Ocean.

D.
They all have an extensive highway system.

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.