Final answer:
The object with the greatest inertia is the aircraft carrier.
Step-by-step explanation:
The object with the greatest inertia is the aircraft carrier. Inertia is a property of matter that measures its resistance to changes in motion. Since the aircraft carrier is the largest and heaviest object on the list, it has the greatest inertia. In comparison, a pillow has very low mass and would have very little inertia, an airplane has more mass but is still much smaller than an aircraft carrier, and a bowling ball has more mass than a pillow but is still smaller than an airplane and an aircraft carrier.