Which of the choices below represent 100% of the earth's mantle? select one:
a. asthenosphere b. mesosphere c. asthenosphere and mesosphere d. asthenosphere, mesosphere, and the lowermost ultramafic section of the lithosphere.

d. Asthenosphere, Mesosphere, and the lowermost ultramafic section of the lithosphere.

Explanation:

Lithosphere - is the crust and the upper part of the upper ultramafic mantle .

It is rigid part of the upper part of the earth.It extends upto 100-150 km deep from the earths surface.

Asthenosphere - it is the part of upper mantle which is plastic in nature and it extends from the base of lithosphere(150 km) to almost 400 km. Due to convection in this part the lithosphere above it move .

Mesosphere- The lower mantle is also called Mesosphere. It extends from approximately 700 km to 2900 km to the mantle core boundary .