What is the method of hair removal that involves warm wax applied in one direction and removed in another?

The method of hair removal that involves warm wax applied in one direction and removed in another is waxing. This technique is widely used in esthetics for its effectiveness in removing hair from the root, which can result in smoother skin for an extended period compared to other methods. When the warm wax is spread in one direction, it adheres to the hair, and pulling it off in the opposite direction removes the hair from the follicle. This not only ensures a thorough removal but also minimizes the risk of breaking the hair, which can lead to ingrown hairs.

In contrast, other hair removal methods, such as threading and sugaring, utilize different techniques that do not involve the application and removal of wax. Threading uses a thin thread to trap and lift hairs, while sugaring involves a paste made from sugar, lemon, and water that is applied and removed differently from traditional waxing. Depilation typically refers to methods that remove hair at the skin's surface, like shaving or using depilatory creams, which do not involve pulling hair from the follicle. This distinction underscores why waxing is recognized for its particular method of application and removal using warm wax, making it the correct answer in this context.