Which of the following services is not included in cosmetology?

Threading is primarily classified as a form of hair removal rather than a cosmetology service. While threading can certainly enhance a person's appearance by shaping eyebrows or removing unwanted facial hair, it does not fall under the traditional scope of services that are defined within the cosmetology license in Texas.

Cosmetology includes hair services (like hair coloring), nail care services (such as manicures and pedicures), and makeup application, all of which focus on enhancing beauty through various techniques and treatments. These services are recognized as part of a cosmetologist’s practice. Threading, however, is typically performed by estheticians or individuals specializing in esthetics rather than those specifically trained in cosmetology, aligning it more with specialized esthetic services. This distinction is crucial in understanding the boundaries of cosmetology practice in Texas.