We can say that Earth's crust floats on the mantle because
A) the mantle is very hot and flows from internal convection.
B) part of the mantle is hot enough to flow as a plastic solid.
C) the continental crust floats on the oceanic crust.
D) the mantle is below the crust.
B
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Why is systems analysis such a powerful concept for developing an understanding of an environment or an environmental problem? Discuss and provide a clear example