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(a) Irrigation of terraced crop fields
(b) Lift irrigation of cereal crops
(c) Long duration energy storage
(d) Rainwater harvesting system

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Answer:

(c) Long duration energy storage

Explanation:

Pumped-storage hydropower is a type of hydroelectric power generation used for long-duration energy storage. It works by pumping water from a lower elevation reservoir to a higher elevation during periods of low electricity demand. During periods of high electricity demand, the stored water is released back down to the lower reservoir, generating electricity through turbines.

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