Which two categories describe surface texture in hair design?

The correct answer, describing surface texture in hair design as unactivated and activated, emphasizes the dynamic ways hair can present itself based on styling techniques and treatment.

Unactivated texture refers to hair that is natural, without any styling products or manipulation, presenting a more organic appearance. In contrast, activated texture describes hair that has been styled or treated, often enhanced by the use of products that add volume, curl, or shine. This distinction is crucial in hair design, as it allows stylists to communicate techniques and effects accurately while considering how they want to shape the hair's appearance.

Focusing on unactivated and activated as primary categories helps hairstylists decide how to best approach their work based on the desired outcome for the hairstyle while effectively utilizing various techniques to achieve that texture. This understanding is pivotal in delivering looks that can range from sleek and polished to voluminous and textured.