Which refers to the measure of the amount of water vapor in the air?

A. condensation

B. dew

C. humidity

D. sleet

It refers to the term humidity C.

Answer: C. humidity

Explanation:

A. Condensation is the process of conversion of gaseous state to liquid state.

B. Dew is the name given to tiny drops of water that form on cool surfaces when atmospheric vapor condenses.

C. Humidity is defined as a quantity which represents the amount of water vapor in the atmosphere.

D. Sleet is the refreezing of rain falling into a cold layer of air and thus are formed as ice pellets.