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The crust and the upper-most part of the mantle up to a depth of 200 km from the surface of the earth is called:

  • A.Pyrosphere
  • B.Barysphere
  • C.Cryosphere
  • D.Lithosphere

Answer: C

This is the lithosphere.

It comprises the crust and the rigid uppermost mantle, down to roughly 100–200 km, and is broken into the tectonic plates. Below it the asthenosphere is weak enough to flow, which is what allows the plates to move. The cryosphere, by contrast, is the earth's frozen water.

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