What is one component of hairstyling?

The correct answer focuses on the use of hair extensions and wigs as a fundamental aspect of hairstyling. Hairstyling encompasses a variety of techniques and services aimed at altering or enhancing the appearance of hair. The use of hair extensions and wigs fits directly into this category, as they are commonly used to create different hairstyles, add volume or length, or offer versatility in a person's overall look.

In contrast, the application of chemical dyes, while related to hair services, is more specifically categorized under hair coloring rather than hairstyling itself. Performing nail care services and conducting skin treatments fall outside the scope of hairstyling, as they pertain to the care and aesthetic treatment of nails and skin, respectively. Thus, the focus on hair extensions and wigs aligns most directly with the core practice of hairstyling.