Which of the following is a common method of hair removal in cosmetology?

Laser hair removal is a common method of hair removal in cosmetology that uses concentrated beams of light to target and destroy hair follicles. This technique offers a longer-lasting solution compared to traditional methods, such as shaving or trimming, as it can significantly reduce hair growth after several sessions. Laser hair removal is particularly popular due to its effectiveness and the precision it provides, allowing for targeted treatments in various areas of the body.

While trimming and shaving are methods used to manage hair length or remove hair at the skin surface, they do not offer the same durability or reduction in hair growth as laser treatments. Blow drying, on the other hand, is not related to hair removal but rather a technique used to dry and style hair. Therefore, laser hair removal stands out as the most advanced and lasting method among the choices listed.