Correct Answer: Hydro-electricity

Solution : The correct option is Hydroelectricity.

Sometimes the term "white coal" refers to hydroelectricity. Hydroelectricity is produced by harnessing the energy of moving or falling water, often via the use of dams and turbines to transform the kinetic energy of the water into electrical energy. It is seen as a clean and renewable source of energy, in the same way that coal is regarded as a fossil fuel. When compared to regular coal, which is a non-renewable and polluting energy source, the term "white coal" emphasises the ecologically favourable and renewable qualities of hydroelectric electricity.