What happens when the temperature of air decreases to the dew point or below the dew point

When the temperature of the air lowers to the dew point or below the dew point the water vapor present in air will change the phase from gas to liquid by the process of condensation.

Which then results into the fog, dew on leaves and clouds.

Explanation:Dew point temperature means the temperature at which water vapors present in air change their phase from gas to liquid.This happens by the condensation which is the change of the physical state of matter from the gas phase into the liquid phase and is the opposite of vaporization.So changing the temperature of the air, the water vapors will turn into dew and fog.

Covalent bond is the correct answer