According to Newton's first law of motion, what must happen to move an object at rest?

According to Newton's first law of motion, a force must act on it to move an object at rest.

Explanation:

According to the Newton's first law of motion, for an object to change its velocity (either a change in the magnitude or the direction), there must be a cause to it which is defined as a net external force.

So for an object to move from rest, an external force must be applied to it.