Describe the difference between a rigid body and a real body

A rigid body is defined as a body on which the distance between two points never changes whatever be the force applied on it. A real body however will change if enough pressure is added.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

voluntary muscles are controlled by the cerebellum.