Final answer:
A bowling ball has more inertia than a balloon because it has a greater mass, making it more difficult to change its motion.
Step-by-step explanation:
The force definition in physics is an interaction that when unopposed will change the motion of an object. A force can cause an object with mass to change its velocity, which includes to begin moving from a state of rest, i.e., to accelerate. Considering inertia, between a balloon and a bowling ball, the bowling ball has more inertia. Mass is a measure of inertia, which is the property of a body to remain at rest or to continue moving at a constant velocity. The bowling ball has a greater mass compared to a balloon, and thus it's more difficult to change the motion of the bowling ball than that of the balloon.