Why is the ozone layer important for life on Earth?

The ozone layer is crucial for life on Earth primarily because it protects living organisms from harmful ultraviolet (UV) radiation emitted by the sun. The ozone layer, which is situated in the stratosphere, absorbs the majority of the sun's harmful UV radiation. By doing so, it serves as a protective shield, helping to prevent skin cancer, cataracts, and other health issues in humans, as well as protecting ecosystems and wildlife. The detrimental effects of increased UV exposure can lead to significant disruptions in food chains and biodiversity, making the preservation of the ozone layer vital for the health of the planet's inhabitants.

While other choices touch on significant components of Earth's environment, they do not accurately reflect the specific function of the ozone layer. For instance, while the ozone layer can influence climate indirectly, regulating climate is not its primary function. The production of oxygen is primarily the role of photosynthetic organisms, such as plants and algae, not the ozone layer itself. Lastly, while carbon dioxide is an essential greenhouse gas that contributes to climate regulation, the ozone layer does not trap carbon dioxide directly; rather, it plays a distinct role focused on filtering harmful UV radiation. Thus, the protection from UV radiation is the key reason the ozone layer is so important for sustaining life