Uses water flow to spin turbines for electricity?

• A. Desalination
• B. Hydropower
• C. Solar power
• D. Wind power

Answer: (B)

Hydropower uses moving water to spin turbines connected to a generator, turning the water’s kinetic energy into electricity. The flow of water provides the energy that turns the turbine blades, and the amount of power depends on how much water is moving and how much height the water drops (head). This makes it a reliable, renewable way to generate electricity at scale, with the ability to adjust output by changing the flow.

Desalination is about removing salts from seawater or brackish water and does not convert water flow into electricity. Solar power uses sunlight to generate electricity, and wind power uses wind to turn turbines. Neither relies on the flow of water to produce electrical energy.