Product labeling includes which of the following that causes changes in the skin's appearance?

Product labeling identifies active agents as the components responsible for causing changes in the skin's appearance. These active agents are formulated to target specific skin concerns, such as hydration, anti-aging, acne treatment, or pigmentation correction. For instance, ingredients like retinol, vitamin C, and hyaluronic acid are well-known active agents that can significantly improve the skin's texture, tone, and overall appearance when incorporated into skincare products.

Inactive ingredients, while important for the formulation and stability of a product, do not directly affect the skin's appearance. Instead, they serve as carriers or stabilizers. Preservatives are added to extend the shelf life of products and ensure safety but are not intended to produce any changes in the skin itself. Fragrance components are primarily included for scent enhancement and do not contribute to the skin's appearance-changing effects. Thus, active agents are the key elements listed on product labels that indicate potential visible effects on the skin.