Answer:
The answer is C) Flowing water
Step-by-step explanation:
Hydroelectric power is a form of energy production used mostly in dams that takes electricity out of flowing water. The water flows through a turbine turing a fan shaped metal, creating friction. This friction is then turned into electricity.
If that information isn't enough, hydro is a latin term that means "water". So combined, it would be (water) electric power. Therefore, flowing water is the answer.