What is the chemical reaction that results in two surfaces sticking together?

The correct choice is adhesion because it specifically refers to the process where two different surfaces come together and are held in place due to the intermolecular forces at play. This phenomenon is critical in various applications, including manicuring, where products like nail adhesives rely on adhesion to bond enhancements, glues, or other materials to the natural nail.

Adhesion can occur through several mechanisms such as physical attraction or chemical reactions that create a lasting bond between the two surfaces. This is particularly important in the context of manicuring, where the ability for products to adhere to the nail surface can determine the effectiveness and longevity of treatments such as nail polish or artificial nails.

The other options may relate to various forms of sticking or joining but do not specifically explain the function or the context of two different surfaces bonding as well as adhesion does. Coherence typically refers to the consistency of a body of work or ideas; fusion connotes a merging into one entity, often used in physical processes or different forms of matter; while bonding generally describes a connection, it is more about the interaction between similar materials rather than the specific interaction between different surfaces.