What is the ozone layer’s role in the atmosphere?

The ozone layer plays a crucial role in protecting life on Earth by absorbing a significant portion of the harmful ultraviolet (UV) radiation emitted by the Sun. This layer, found primarily in the stratosphere, contains a high concentration of ozone (O3) molecules, which are effective at filtering out the most harmful types of UV radiation. By absorbing UV radiation, the ozone layer helps prevent skin cancer, cataracts, and other health issues in humans, as well as protecting ecosystems, including marine environments and terrestrial flora.

The other options do not accurately describe the primary function of the ozone layer. While Earth's temperature regulation is influenced by the atmosphere as a whole, the ozone layer specifically does not directly regulate temperature. Oxygen production predominantly occurs through photosynthesis carried out by plants, algae, and certain bacteria, rather than the ozone layer. The layer also does not serve as a barrier against weather conditions, which are primarily influenced by other atmospheric components, such as water vapor and air currents. Thus, the function of the ozone layer as an absorber of ultraviolet radiation is its most significant and vital role.