The correct answer is c a power plant burning coal and producing electricity.
Explanation:
According to the first law of thermodynamics it can be stated that energy can neither be created nor destroyed.Energy can only be transformed.The total amount of energy of universe always remains constant.
A powerplant burning coal and producing electricity best suits the first law of thermodynamics because here the heat energy is being converted into electric energy and no energy is lost during the transformation of energy.
