The correct answer is Evaporation.

Important Points

• Evaporation
  • The process of conversion of a liquid into its vapors at room temperature is called evaporation.
  • The temperature at which the water starts evaporating is known as latent heat of vaporization.
• ​Sublimation
  • It is a process of conversion of a solid into vapor without passing through the liquid state.
  • Examples of sublimes are Iodine, Camphor, etc.
• Condensation
  • ​It is the process of conversion of the gas phase into the liquid phase.
  • Condensation is caused by the loss of heat.

Key Points

• An earthen pitcher used in summer cools water in it essentially by evaporation of water from its porous surface.
• The walls of an earthen pot are porous, which leads to seepage of water and evaporates from the surface of the pot.
• The heat required for evaporation is taken from the water inside the pot, thus cooling the water stored inside. This is the reason why water remains cool in the earthen pot even on hot summer days