Question

what do unbalanced forces do?

unbalanced forces allow an object's motion to stay the same
unbalanced forces cause an object's motion to change.
unbalanced forces cannot change an object's direction.
unbalanced forces can make an object move in the opposite direction of the force that is applied.

Answer 1

Unbalanced forces cause an object's motion to change. Specifically, they can make an object move in the direction of the force applied, change its speed or its direction, or both.