cooler air is transferred to the object. energy in the object is transferred to the surrounding air. atoms in the object react with the oxygen in the air. energy in the object cancel out energy in the air.
I gave my students this multiple choice question: Hot objects begin to cool as

Only one answer is correct among these 4 choices:
- cooler air is transferred to the object.
- energy in the object is transferred to the surrounding air.
- atoms in the object react with the oxygen in the air.
- energy in the object cancel out energy in the air.

Could you tell me which one is correct?

energy in the object is transferred to the surrounding air.