"Many people ride a bicycle for fun and exercise. Some people ride a bicycle to work because it saves money and benefits the environment by reducing the use of fossil fuels. Which of these is not an example of the bicycle using mechanical energy?

A. The pedals, gears, and chain help turn the wheels.
B. The wheels turn when the bicycle moves.
C. The front wheel guides the bicycle as it moves.
D. The reflector allows the bicycle to be seen at night.