The question you are asked to give ans answer is:
What gets wet when it dries?
The explanation of this brainteaser is rather simple: when a towel is used to dry a person or object, the towel absorbs moisture, becoming wetter and wetter. The person or object, on the other hand, becomes drier as the towel absorbs the moisture. An alternative phrasing of this riddle is, “The more it dries, the wetter it becomes.”