Question

The layer of the earth where mantle convection occurs and on which the earth's crust rests is the

Answer 1

asthenosphere is the layer where mantle convection occurs and on which the earth crust lies.

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Answer 2

In the passage this question was provided for, you should have been able to locate the fallowing text: "the outer layer of the mantle; made up of plastic or semi-molten rock" and many others to imply this answer.

Answer: Asthenosphere