The two correct descriptions of Earth's interior layers are:
- The asthenosphere is located below the lithosphere.
- The mantle is composed of silicate material.
The outer core is primarily composed of liquid iron and nickel, while the inner core is solid with similar composition. The mesosphere refers to a part of the mantle beneath the asthenosphere, and the crust is primarily composed of silicate rocks, not iron, nickel, or sulfur.