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Tidal energy is used for the production of electricity from water.

Explanation:

In tidal energy, tides of water is used as a source of energy which is converted into other forms of energy, especially for electricity production. It is low cost electricity production method. Tidal plants are installed inside the water on the shore of sea where tides are in great amount. The energy produced from it is clean because it does not pollute the environment.

Thermoelectricity

Explanation:

A thermal power station is a power station in which heat energy is converted to electric power.These types of power plants, called thermoelectric or “thermal” plants, boil water to produce steam for generating electricity. In most places the turbine is steam-driven. Water is heated, turns into steam and spins a steam turbine which drives an electrical generator.

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substitution is the answer in this case