What is the process of liquid water turning into vapor called?

Correct answer: Evaporation

Evaporation is the change of liquid water into water vapour at the surface of the liquid. It can occur below the boiling point because some surface molecules gain enough energy to escape into the air. Heat generally increases the rate, and wind, dry air, and a larger exposed surface can also make evaporation faster. It is an important process that moves water from oceans, soil, and plant surfaces into the atmosphere.

Option B is correct. Condensation is the reverse change, from vapour to liquid. Sublimation is the direct change between solid and vapour, while precipitation is water falling from clouds as rain, snow, or another form. Therefore, when liquid water becomes vapour, the correct term is evaporation. The supplied answer and its basic explanation are accurate, although evaporation is not limited only to a large overall temperature increase.