which example demonstrates kinetic energy

The example that demonstrates kinetic energy is **a wave crashing on the shore**. Kinetic energy is the energy of motion, and a wave in motion embodies that energy as it moves towards the shore.

The other options involve potential energy or are stationary:
- A stretched-out rubber band has potential energy due to its tension.
- A car parked in the parking lot is not in motion and therefore does not have kinetic energy.
- A rock sitting at the top of a hill has gravitational potential energy due to its elevated position.