What is the purpose of a facial mask in beauty therapy?

The primary purpose of a facial mask in beauty therapy is to hydrate and treat the skin. Masks are formulated with various ingredients designed to deliver concentrated benefits, such as hydration, nourishment, or treatment for specific skin concerns such as acne, dryness, or aging. When applied, masks create a barrier on the skin that can help to lock in moisture, enhance absorption of active ingredients, and promote skin healing and rejuvenation.

While some masks may provide mild exfoliation, their main goal is to offer deeper hydration and specific treatment benefits, which is why option B stands out as the most accurate answer. Additionally, removing hair is a function of techniques such as waxing or threading rather than a facial mask. Similarly, increasing skin temperature may be a byproduct of some treatments but is not a primary function of facial masks, which are more focused on skin care and improvements.