What man made object is likely to endure long after humans have disappeared from new york city?

Why is corruption increasing in nepal? write in sentence

Why were so many distinctive cultures able to develop over time in asia?

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.