Emollients in moisturizing creams function by:

Emollients in moisturizing creams are primarily designed to create a barrier on the skin's surface, which helps to prevent moisture loss and allows the skin’s natural fluids to accumulate. This barrier function is essential for maintaining hydration, promoting a smooth texture, and improving the skin's overall appearance. By sealing in moisture, emollients can help to soften and soothe the skin, making them particularly beneficial for individuals with dry or compromised skin.

The other options focus on different functions that do not relate to the primary role of emollients. For instance, removing dead skin cells typically involves exfoliation, while infusing color into the skin pertains to cosmetic products rather than moisturizers. Preventing acne involves maintaining skin clarity and balance, which necessitates different active ingredients that target oiliness and bacteria rather than the hydrating properties of emollients.