a zookeeper had a difficult time moving the elephant back inside for the evening. The elephant is difficult to move because a. It has unbalanced forces acting on it. b. It has high a high amount of momentum. c. It has balanced forces acting on it. d. It has a high amount of inertia

Answer: Option D: It has a high amount of inertia is correct.

Explanation: Inertia is the reason heavy things don't like to move very easily. Heavy objects have a high amount of inertia making them harder to move while lighter things have a lower a mount of inertia making them easier to move.