I think your answer is B.) The objects must be in direct contact with one another
The cycles within which earth's matter moves are closed systems. This means nothing is gained or lost from the system; it only changes from one form to the other. The total amount of matter on earth remains the same. Using tectonic plates as an example, divergent boundaries occur where new oceanic crust is being created. New crust is being created and simultaneously the same amount of crust is being destroyed at convergent margins.
The correct answer for this question is option C
The mantle is the largest layer of the earth it takes up 84% of the earth. there are two sections in the mantle, the top is called the lithosphere and it also includes the crust. the lithosphere is a solid substance made out of dense rock that is about 1300 degrees. the bottom is called asthenosphere.
