Substance is used to secure a nail tip to the natural nail is called?

Adhesive is the correct answer because it is a substance that is specifically designed to secure a nail tip to the natural nail. Polish is not used for this purpose, as it is typically applied as a top coat for color or shine. Gel is a type of polish that requires a special lamp for drying and is not made for securing nail tips. Acrylic is a type of nail enhancement that is not specifically designed for securing nail tips but can be used as an alternative to adhesive. Overall, adhesive is the most appropriate and effective substance for securing a nail tip to the natural nail.