Which of the following is a benefit of using sunscreen?

The selected answer, which highlights that sunscreen protects against UV damage, is indeed the most accurate benefit associated with sunscreen use. Sunscreen serves a vital role in safeguarding the skin from the harmful effects of ultraviolet (UV) radiation. UV rays can lead to various skin issues, including sunburn, skin cancer, and accelerated aging. By applying sunscreen, individuals can significantly decrease their risk of these adverse effects, promoting overall skin health.

While some of the other options mention benefits that may seem relevant, they do not accurately capture the primary function of sunscreen. For instance, while sunscreen can help prevent certain signs of aging as a secondary effect of its UV protection, that is not its primary function. The option regarding dehydration does not apply to sunscreen since its main role does not relate to moisture retention in the skin. The claim that sunscreen helps treat acne is also misleading; while some formulations may assist acne-prone skin, sunscreen is not designed as a treatment for acne itself. Thus, the primary and most significant benefit remains the protection against UV damage.