Answer: Option (D) is the correct answer.
Step-by-step explanation:
When kinetic energy of falling water is converted to electricity then the generated power is called hydroelectric power.
In a hydroelectric plant, a reservoir is used to store water in a dam. This dam is located on a river. When water is released from this reservoir then it flows through the turbine. As a result, this turbine spins and activates a generator which produces electricity.
Thus, we can conclude that hydroelectric power is generated by converting the kinetic energy of falling water to electricity.