Question

what is a hydroelectric power plant? a turbine that is place in a river and turned by it. a dam that is built across a river, making a body of water that can be used to create energy. a chemical reaction caused by sending a very strong electric pulse through a river.

Explanation:

A hydroelectric power plant is a facility that harnesses the energy of flowing water. A dam is built across a river to create a reservoir. The water in the reservoir has potential energy. When released, this water flows through turbines, converting the potential energy into kinetic energy (turning the turbines). The turbines are connected to generators, which then convert the mechanical energy from the turbines into electrical energy. A turbine alone (first option) is just a part of the system and not the entire plant. A chemical reaction caused by an electric pulse (third option) is not related to hydroelectric power generation principles.

Answer:

A dam that is built across a river, making a body of water that can be used to create energy.