Which of the following increases the rate of evaporation?

Correct answer: High temperature

Direct answer: C, high temperature. Evaporation is the change of liquid water into water vapour from a surface. Heating gives water molecules more energy, so more of them can escape from the liquid surface into the air in a given time. A is wrong because low temperature usually gives molecules less energy and slows evaporation. B is wrong in this comparison because still air does not remove moist air from the surface; moving air generally helps evaporation by carrying vapour away. D is wrong because shade usually reduces heating and therefore tends to lower the rate. C is correct because heat increases the energy available for escape. Other factors also matter, such as exposed surface area, wind, and humidity, but temperature is the relevant factor among these choices. Memory cue: heat supplies energy for evaporation; cooling favours condensation.