Which of the following is a primary function of hair products?

The primary function of hair products is to provide texture and control. Different hair products, such as gels, mousses, and pomades, are specifically designed to help style hair by adding hold, enhancing its natural texture, and allowing for various styling techniques. These products enable the user to manage how the hair looks and behaves, whether it’s achieving a sleek, polished finish or a more tousled, free-flowing effect.

While altering hair color is indeed a function of certain hair products, it is not the primary purpose for most styling products, which focus on shaping and texturizing rather than changing color. Similarly, preventing hair growth and increasing hair volume permanently fall outside the typical roles of hair products, as most products provide temporary effects and styling capabilities rather than permanent changes to hair growth patterns or volume.