Which method of hair removal does not involve chemicals?

Tweezing is a method of hair removal that utilizes mechanical means to extract hair from the follicle, without the involvement of any chemicals. This technique usually involves the use of a specialized pair of tweezers to grasp and pull out individual hairs, making it precise and ideal for detailing areas such as eyebrows or removing a few stray hairs.

In contrast, waxing, laser hair removal, and depilatory creams rely on chemical processes. Waxing involves using a sticky substance that adheres to hair and is then pulled away, which also does not involve any chemicals but primarily uses heated wax. Laser hair removal uses concentrated beams of light to target and destroy hair follicles, which is a technological approach. Depilatory creams contain chemicals that dissolve hair at the skin's surface, providing a different form of hair removal altogether.

Therefore, tweezing stands out as a purely mechanical method, making it the correct choice in this context.