Evaporation is the process where liquid molecules escape into the gas phase from the surface of a liquid. The rate of evaporation depends on various factors, and surface area is a significant one. When the surface area increases, more liquid molecules are exposed to the air. This exposure allows more molecules to escape into the atmosphere as vapor, thereby increasing the evaporation rate. This phenomenon can be observed by comparing a shallow dish of water to a narrow glass of water; the larger surface area of the shallow dish results in faster evaporation. Therefore, the correct explanation is: Evaporation increases with increase in surface area.