What is the primary function of a nail file?

The primary function of a nail file is to shape and smooth the edges of the nails. Nail files come in various textures and materials, allowing for different degrees of abrasiveness, which helps in refining the nail shape and ensuring a clean edge. Proper shaping is essential not only for aesthetics but also for preventing snags and breaks. A well-shaped nail contributes to a more polished look and enhances the overall appearance of the manicure.

While polishing, cuticle removal, and nail polish application are all important aspects of nail care, they do not fall under the primary function of a nail file. Polishing involves using a specific tool or buffer designed for that purpose, while cuticle removal typically requires a tool like a cuticle pusher or scissors. Similarly, applying nail polish accurately requires a brush and technique, rather than the mechanical action of a nail file. Thus, the correct choice highlights the specific role that a nail file plays in nail care and preparation.