Question

when a body can said to be in motion? Can any body be at absolute rest ​

Answer 1

Answer:

when the body is moving in any way.

A body can never be at absolute position.

Answer 2

Answer:

when position of an object changes with respect to surrounding then object is said to be in motion

no not a single body can stay at absolute rest because if that body is at rest with respect to observer but , it is moving because earth is rotating,