Maryland Barber State Practice Exam

Corrective hair treatments typically deal with the hair shaft, which is the visible portion of hair that extends above the scalp. This includes treatments such as conditioning, coloring, and styling. Options A, B, and D are incorrect because they refer to parts of hair that are located beneath the surface of the scalp and are not typically targeted in corrective hair treatments. Additionally, the hair root and hair follicle are responsible for hair growth and are not typically involved in treatments for existing hair.