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Correct answer has to be (A) . As it was seen and observed deeply that no earthquake has been observed below 650km. At such depths rocks do not undergo brittle deformation (no brea...

The answer should be A) no brittle material is present below 650 km. The other options are incorrect as Seismic waves from all depths do reach the Earth surface. Mantle is not comp...

Answer (A) No brittle material is present deeper than that depth Earthquake is a term used to describe sudden slip on a fault. Earthquake occurs because of movement along fracture...