Question

what is asthenosphere​

Answer 1

Answer:

Asthenosphere is the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.

Answer 2

Explanation:

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The asthenosphere meaning "without strength", and thus "weak", and sphere is the highly viscous, mechanically weak and ductile region of the upper mantle of the Earth.