What causes the air above a pot of boiling water to become warm?

the air transfers thermal energy to the water vapor.

the water vapor transfers thermal energy to the air.

the particles in the air lose kinetic energy.

the particles in the water vapor gain kinetic energy.

Answer;

The water vapor transfers thermal energy to the air.  

Explanation;

Heat energy can be transferred from one place to another by three main processes. In convection, heat energy is carried by the movement of particles of matter. In conduction, heat is transferred by particles vibrating. In radiation, heat is carried directly by electromagnetic waves.

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