Question

Rest and motion are inter-related to each other, explain​

Answer 1

An object in motion will stay in motion until a force is acted upon it, and object at rest will stay at rest until a force is acted upon it.

Answer 2

Rest and motion are the relative terms because they depend on the observer's frame of reference. So if two different observers are not at rest with respect to each other, then they too get different results when they observe the motion or rest of a body.