What is the role of ozone in the stratosphere?

• A. To create clouds
• B. To absorb heat from the Earth
• C. To block harmful UV radiation
• D. To facilitate weather patterns

Answer: (C)

The role of ozone in the stratosphere is primarily to block harmful UV radiation. Ozone molecules absorb the majority of the sun's harmful ultraviolet light, particularly UV-B and UV-C rays, which can cause skin cancer, cataracts, and other health issues, as well as adversely affect ecosystems. The ozone layer acts as a protective shield that prevents these rays from reaching the Earth's surface, thereby playing a crucial role in maintaining environmental and biological health.

While other processes in the atmosphere can involve clouds, heat absorption, or weather patterns, they do not pertain to the specific function of stratospheric ozone. For instance, while clouds can influence weather patterns and reflect sunlight, they do not serve the protective role that ozone does. Similarly, while heat absorption is an important process in Earth's atmosphere, it is not directly related to the specific function of ozone in the stratosphere, which is focused on UV protection. Thus, the correct answer emphasizes ozone's protective function against harmful radiation.