Recently, the term “pumped-storage hydropower” is actually and appropriately discussed in the context of which one of the following?

Long duration energy storage

Pumped-storage hydropower stores energy by pumping water from a lower reservoir to a higher reservoir when electricity is available or demand is low. When electricity is needed, the stored water is released through turbines to generate power. This allows large-scale, long-duration energy storage and helps balance electricity supply and demand. Options A and B relate to agricultural irrigation rather than energy storage. Option D refers to collecting rainwater, which is not the defining purpose of pumped-storage hydropower. Therefore, option C is correct.