Answer:The correct answer is c. Coal is used to convert water into steam that turns turbine blades to produce electricity.
Step-by-step explanation:
Coal is a fossil fuel, and its use in generating electricity is a classic example of a nonrenewable energy system. Once coal is burned to produce energy, it cannot be replaced on a human timescale because the process takes millions of years to form coal naturally. This is in contrast to renewable energy sources like solar, geothermal, and wind energy, which are considered sustainable because they are naturally replenished and can be used repeatedly without being depleted.