A towel dries fastest when placed under direct sunlight due to the heat and energy from the sun, which accelerates evaporation. However, factors such as humidity levels can significantly affect drying efficiency; at 100% humidity, a fan may be less effective. The size of the towel, water content, and environmental conditions like temperature and air density also play crucial roles in the drying process. While a moving fan can aid in drying by increasing air circulation, it may not compete with the direct heat of sunlight in optimal conditions. Ultimately, the best drying method depends on specific environmental variables.
