Which of the following describes the role of moisturizers?

Moisturizers are designed specifically to provide hydration to the skin and help maintain its moisture balance. They work by delivering water to the skin, helping to lock in moisture, and strengthening the skin's barrier function. Proper hydration is essential for healthy skin as it prevents dryness, flakiness, and can combat the signs of aging.

While deeply cleansing the skin, removing excess oils, and exfoliating dead skin cells are essential skincare processes, they do not fall under the primary function of moisturizers. These products focus on enhancing the skin’s moisture content, making option B the most accurate descriptor of a moisturizer's role. Maintaining adequate hydration is vital for the skin's overall appearance and health, thus reinforcing the importance of moisturizers in daily skincare routines.