Which of the following statements about ultraviolet radiation is true?

Ultraviolet radiation plays a crucial role in the synthesis of vitamin D in the skin, which is essential for various biological functions, including maintaining bone health. When UVB rays from sunlight hit the skin, they trigger a chemical reaction that converts a form of cholesterol into vitamin D3, which is then converted into its active form by the body. Therefore, the statement that ultraviolet radiation contributes to the production of vitamin D in the skin is accurate and reflects its biological importance.

The other statements misrepresent the nature of ultraviolet radiation. For example, while ultraviolet radiation can cause skin damage, it is not correct to claim that it is incapable of doing so. Also, ultraviolet radiation differs significantly from radio waves in terms of frequency; ultraviolet has a much higher frequency than radio waves. Finally, while some ultraviolet radiation is invisible to the human eye, certain types can be partially detected without special equipment, meaning that the statement about needing special equipment for visibility is not entirely correct.