The asthenosphere is located in the upper mantle. The statement will be true. Thus, option (a) true is correct.
What is asthenosphere?
The zone layer of the Earth's mantle and the ductile area of the top mantle are referred to as the asthenosphere. The top layer to be hotter and much more fluid than the lithosphere.
The lithosphere is between 80 and 200 kilometers beneath the surface, while the reaches as far beneath the surface as 700 kilometers. The weakest region in terms of mechanics is the asthenosphere.
Asthenosphere, the lowest layer of the planet, is significantly hotter. Because of pressure on the asthenosphere layer, it is now hotter. The earth is made of solid rock. The heat makes the rocks flow like a liquid.
Therefore, option (a) true is correct.
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