Identify the correlation between the first two words and suggest the suitable words in the fourth place. Coal : thermal energy : : water storage : _______.
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Solution
Coal:thermal energy, thermal energy produced in thermal power plant in which electricity produced by coal.
Water storage : hydroelectric energy. It is produced in hydroelectric power plant use a dam on a river to store water in a reservoir. Then flows through a turbine, spinning, it, which in turn activates a generater to produce electricity.