Final answer:
The dew point temperature is the temperature at which the air becomes saturated with water vapor and water starts to condense out of the air.
Step-by-step explanation:
The correct answer is D. dew point temperature. When the relative humidity reaches 100%, excess water vapor condenses and forms liquid water. The dew point temperature is the temperature at which the air becomes saturated with water vapor and water starts to condense out of the air.