c) Water flowing through an intake pipe causes a turbine to spin.
Explanation:
The production of hydro electrical power can be done when the water passes from the dam to the rivers which are below dam.
The energy is based on the amount or pressure of the water if the more water is passing through the intake pipe then there is more production of energy. An artificial lake is created behind the dam.
Turbines which are surrounded by magnets produce the electricity when the flowing water is hit on the turbines than turbines rotates and produce electricity and turbines are present in the dam.
Therefore, water which is flowing through an intake pipe causes spinning of turbine which produce electricity.
