Which activity includes the processes of cutting, trimming, and coloring hair?

The activity that encompasses the processes of cutting, trimming, and coloring hair is hair design. This discipline focuses specifically on creating various hairstyles and involves a comprehensive understanding of hair types, cutting techniques, and coloring methods. Hair design professionals are trained to enhance the visual appearance of hair through artistic and technical skills.

In the context of the other options, nail technology refers to services provided for the care and beautification of nails, including manicures and pedicures. Barbering primarily deals with men’s grooming services, which may include haircutting and shaving, but it does not fully encapsulate the broader, more creative aspects of hair styling found in hair design. Esthetics focuses on skincare treatments, makeup applications, and beauty therapies rather than hair-related services. Each of these fields serves distinct purposes and requires different skill sets, with hair design being the specific discipline dedicated to hair modification and styling.