Answer :
The option which best describes the movement of an object at rest if no outside forces act on it is that it will stay at rest due to inertia.
Answer;
It will stay at rest due to inertia.
Explanation;
According to Newton's first law, an object at rest remains at rest, or if in motion, remains in motion at a constant velocity unless acted on by a net external force.
The law of motion states that there must be a cause; which is a net external force;for there to be any change in velocity, either a change in magnitude or direction.
Inertia of Rest is the tendency of an object (or body) to continue its state of rest unless it is acted upon by an external force.