What type of material is found in the atmosphere?

A. A mixture of magma and superheated water.

B. An incompressible fluid of molten rock

C. Solid Rock

D. A viscoelastic fluid of molten rock

Answer: D.) A viscoelastic fluid of molten rock

Explanation: The layer below the lithosphere, the upper layer of the mantle of the earth with high heat pressure. It is made up of almost solid rocks but also flows not which indicates that it consist of viscoelastic fluid of molten rocks. This is because in some regions there can be presence of molten rocks.