Condensation: The process by which water vapour in the air is changed into liquid water is called condensation. This caused the water vapour to condense, or turn into its liquid form.
Condensation is crucial to the water cycle because it is responsible for the formation of clouds.
Evaporation: The vaporization occurring from the free surface of a liquid is called evaporation.
Evaporation is the escape of molecules from the surface of a liquid.
This process takes place at all temperatures and increases with the increase of temperature.
Evaporation leads to cooling because the faster molecules escape and, therefore, the average kinetic energy of the molecules of the liquid (and hence the temperature) decreases.
Sublimation: It is the conversion of a solid directly into vapours.
Sublimation takes place when the boiling point is less than the melting point.
The heat required to change a unit mass of solid directly into vapours at a given temperature is called the heat of sublimation at that temperature.
Diffusion: It is the movement of a substance from an area of high concentration to an area of low concentration.
Diffusion happens in liquids and gases because their particles move randomly from place to place.
EXPLANATION:
From the above discussion, the conversion of a solid directly into vapours is called sublimation. So option 3 is correct.