What is one major reason for high daytime evaporation in desert regions?

Correct answer: High temperature and low humidity

Correct answer: A, high temperature and low humidity. Evaporation occurs when liquid water molecules gain enough energy to escape into the air. Strong daytime heating in desert regions gives surface water more energy, so evaporation tends to increase. Desert air is also commonly dry, meaning its relative humidity is low and it has a greater capacity to receive additional water vapour. These two conditions work together: heat supplies energy and dry air maintains a moisture deficit. B is wrong because low temperature supplies less energy and high humidity reduces the capacity of air to accept more vapour. C is wrong because continuous snowfall is not the typical reason for rapid daytime desert evaporation. D is wrong because dense vegetation is not the defining desert condition and can instead influence moisture through shade and transpiration. The exact rate also depends on wind, exposed water, and available moisture. Memory cue: “hot surface plus thirsty air means faster evaporation.”