What cosmetic helps color adhere to the nail plate?

The base coat serves as an important foundation for nail polish application, enhancing the adhesion of color to the nail plate. It helps create a smooth surface, fills in ridges, and can prevent staining of the natural nail while allowing the color to adhere better, which results in a more durable and longer-lasting manicure. In addition, the base coat can sometimes contain ingredients that help nourish and protect the nails, making it an essential step in the manicure process.

While the other options serve unique purposes—such as sealing the manicure with a top coat, reinforcing nail strength with a nail hardener, or removing polish with nail polish remover—they do not specifically contribute to the adhesion of color to the nail plate like a base coat does. The function of the base coat is targeted directly at ensuring the polish stays on the nail effectively.