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lainieforsythe

B, reservoirs.

Dams are used to conserve water and to convert it into hydroelectric energy.

Aqueducts are used to move water from one source to another, think sort of like irrigation.

Valleys are plains of grass, has nothing to do with water.

Reservoirs however, are used to reserve water, Reserveoirs.

adefioyelaoye

Reservoirs is referred to as the structure which holds water until it is needed and is denoted as option B.

What is a Reservoir?

This is usually created using a dam and it is used to store water for future purposes.

This helps to prevent wastage and ensure that the water is easily retrieved when needed.

Read more about Reservoir here https://brainly.com/question/277454

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