Which type of radiation is divided into bands known as UV-A, UV-B, and UV-C?

Ultraviolet radiation is the correct answer because it is categorized into three distinct bands: UV-A, UV-B, and UV-C. This classification is based on the different wavelengths that make up ultraviolet light.

UV-A, with the longest wavelength, is known for its ability to penetrate the skin more deeply and is associated with aging and long-term skin damage. UV-B, with a shorter wavelength, is the primary cause of sunburn and has a significant role in the development of skin cancer. UV-C, having the shortest wavelength, is mostly absorbed by the Earth's atmosphere and does not typically reach the surface; nevertheless, it is utilized in various applications, such as sterilizing equipment due to its ability to kill bacteria and viruses.

Understanding these categories is crucial in fields such as dermatology, environmental science, and oncology, as it helps in assessing the impacts of sun exposure on human health and the environment. The other types of radiation listed do not share this same subdivision into UV bands, making ultraviolet radiation the distinct and correct choice.