heat energy only heat energy and sound energy only heat energy, sound energy, and mechanical energy only heat energy, sound energy, mechanical energy, and chemical energy
I gave my students this multiple choice question: Household appliances convert electricity into one or more different forms of energy. An electric fan can best be described as converting electricity into

Only one answer is correct among these 4 choices:
- heat energy only
- heat energy and sound energy only
- heat energy, sound energy, and mechanical energy only
- heat energy, sound energy, mechanical energy, and chemical energy

Could you tell me which one is correct?

heat energy, sound energy, and mechanical energy only