Which of these best describes Earth's mantle?
Most dense layer, consists of the outer and inner parts
Thinnest under the oceans and thickest under continents
Middle layer, density increases with depth as pressure increases
Least dense layer overall, consists of two layers of different thickness

The best description of Earth's mantle is it is made up of rock so hot that it flows. This layer is also called the asthenosphere. This Earth's mantle has a thickness that reaches 2,900 kilometers to wrap up the Earth's core. It is a rocky layer that covers 84% of Earth's volume.

Explanation:

where is the diagram?

if you insert the diagram ill be able to you