Which of the following is a common indicator of overexposure to UV radiation?

Redness and peeling skin are prominent signs of overexposure to UV radiation, commonly associated with sunburn. When the skin is exposed to UV rays beyond its tolerance, it becomes inflamed, leading to redness, and often the skin will begin to peel as it heals. This peeling is a result of the body's natural response to damage caused by UV exposure, as it sheds the injured skin cells to allow new, healthy skin to grow.

The other indicators listed do not accurately represent the effects of overexposure. Increased energy levels and a greater interest in sunbathing are not typical physiological responses to UV overexposure; in fact, they may arise from unrelated factors. A darkened skin condition may suggest tanning or an increased melanin production as a protective response to UV light, but it does not indicate overexposure per se. In contrast, redness and peeling clearly indicate that the skin has been excessively damaged.