Which of the following is a common effect of UV radiation on the skin?

UV radiation has well-documented effects on the skin, primarily associated with skin aging and damage. Prolonged exposure to UV rays can lead to several detrimental changes, including the breakdown of collagen and elastin fibers, which are critical for maintaining skin's elasticity and firmness. This degradation contributes to the formation of wrinkles, fine lines, and other signs of premature aging, often referred to as photoaging. Additionally, UV radiation can cause damage to skin cells, leading to sunburn and increasing the risk of skin cancers.

The other options are not aligned with the common effects of UV radiation. Increased collagen synthesis is typically associated with proper wound healing or therapeutic treatments rather than exposure to UV rays. A reduction in sebum production is more related to factors like hormonal changes or certain skin conditions, not UV exposure. Lastly, improved skin tone generally results from healthy practices rather than the harmful effects of UV radiation. Thus, option B stands out as the most accurate representation of the impact of UV radiation on the skin.