What is the main function of cuticle oil?

The main function of cuticle oil is to moisturize the cuticles and provide nourishment to the nails, which is why this answer is the most accurate. Cuticle oil typically contains essential oils and other moisturizing ingredients that help to hydrate the skin around the nails, preventing dryness and promoting overall nail health. By keeping the cuticles supple and healthy, cuticle oil can also encourage healthy nail growth and help protect against hangnails and other issues associated with dry skin.

While painting the nails is an important part of manicure services, it does not relate to the nourishing and moisturizing properties of cuticle oil. Similarly, removing nail polish is a separate process that requires specific remover products—not cuticle oil. Strengthening the nail plate, while beneficial, is not the primary role of cuticle oil, which focuses more on the skin surrounding the nails rather than the nails themselves. Hence, the choice that highlights the moisturizing and nourishing aspects is the correct one.