North Dakota Cosmetology Practice Exam

Emollients play a critical role in skin care primarily by softening and soothing the skin. These substances work by creating a barrier on the surface of the skin, which helps to lock in moisture, keeping the skin hydrated and making it feel smooth and supple. Emollients are particularly beneficial for individuals with dry or sensitive skin, as they can help to alleviate irritation and improve the overall texture of the skin.

While some products may focus on roles like removing impurities, providing sun protection, or enhancing color, these are not the primary functions of emollients. Their main purpose is to improve skin texture and comfort, which is why choice C is the most accurate in this context.