And hydroelectric power plants the energy from living water is converted into electric power. What kind of energy transformation occurs when the energy is converted?

Mechanical to electrical

Explanation:

This is called hydroelectric power or hydropower. The most common type of hydroelectric power plant uses a dam on a river to store water in a reservoir. Water released from the reservoir flows through a turbine, spinning it, which in turn activates a generator to produce electricity.

mechanical to eletrical