What is the purpose of a base coat in nail care?

The correct answer highlights the primary function of a base coat in nail care, which is to protect the nail plate and enhance the longevity of the nail polish applied over it. A base coat acts as a barrier between the nail and colored polish, reducing the risk of staining from pigments in the polish and minimizing potential damage to the nail surface. Furthermore, by creating a smoother surface for the application of color, a base coat helps improve the adhesion of the polish, leading to a more durable and long-lasting manicure.

Using a base coat also contributes to an even and professional-looking finish, helping to ensure that the color looks vibrant and stays intact for a longer period. The protective nature of a base coat is especially valuable for individuals with weaker nails, as it can help shield them from external elements and effects of the polish itself.