Which of the following is a primary benefit of exfoliation?

The primary benefit of exfoliation is to remove dead skin cells from the surface of the skin. This process is essential for maintaining healthy skin as it encourages cell turnover, revealing fresher, smoother skin underneath. By getting rid of these dead cells, exfoliation can help to prevent clogged pores, reduce the likelihood of breakouts, and promote a more even skin tone and texture. Additionally, with the removal of the outer layer of dead skin, other skincare products can penetrate better and work more effectively.

Considering the other choices, increasing oil production, darkening the skin tone, and enhancing hair growth do not align with the fundamental purpose of exfoliation. Instead, these options relate to different physiological processes or skincare treatments that do not directly involve the beneficial aspects of exfoliation itself. Thus, the removal of dead skin cells stands out as a core advantage of this practice.