Which of the following is NOT a primary focus of cosmetology?

The choice identifying electrical engineering as the option that is not a primary focus of cosmetology is accurate because cosmetology primarily deals with beauty treatments related to hair, nails, and skin. Hair styling encompasses cutting, coloring, and styling techniques, while nail care includes manicures, pedicures, and nail enhancements. Skincare involves facials, skin analysis, and various treatments aimed at improving the health and appearance of the skin.

In the context of cosmetology, electrical engineering does not fall within its scope as it pertains to the design, development, and application of electrical systems and technology. This field is entirely unrelated to the aesthetic services provided in a salon or spa setting, highlighting the focus areas of hair, nails, and skin that define the profession of cosmetology.