In an earthen pitcher, the water remains cold due to the process of

Correct answer: (b) Evaporation

Explanation

An earthen pitcher keeps water cool by evaporation through its porous walls.

Water seeping out evaporates and draws latent heat of vaporisation from the water inside, lowering its temperature.

Condensation (gas to liquid) and sublimation (solid to vapour) do not occur here.