Answer: Option D.
Generating electricity.
Step-by-step explanation:
Natural resources refers to substances that are exist in nature which can be exploited and use for human benefits.
Natural resource like water, natural gas, uranium and coal are used to generate electricity.
Coal and natural gas are used to generate electricity by combustion.
Hydropower plants use energy of falling water to generate electricity through the moving turbine that rotate which convert the kinetic energy of falling water to electricity.