When an unbalanced force acts on an object,

When balanced forces follow up on an object, the object won't move. If you push against a wall, the wall pushes back with an equal but opposite force. Neither you nor the wall will move. Forces that cause a change in the motion of an object are unbalanced forces.

Answer;

The object accelerates

When an unbalanced force acts on an object, the object accelerates.

Explanation;If the forces acting on a budget are balanced, the motion of the object does not change. The net force acting on the object will be zero.When the net force acting on an object is not zero, the forces acting on the object are unbalanced forces. Unbalanced forces cause objects to change their motion, or accelerate.Balanced forces on an object do not affect the motion of an object while the unbalanced forces change the motion of an object.

It's because 3 if it was 10 it wouldn't look right do it goes up to 4d