What is the main importance of the ozone layer?

The main importance of the ozone layer is that it absorbs most of the sun's harmful ultraviolet (UV) radiation, which is crucial for protecting living organisms on Earth. The ozone layer is found in the stratosphere and serves as a shield that filters out the majority of the sun's UV rays, particularly UV-B and UV-C radiation, which can cause severe damage to skin, eyes, and immune systems in humans, as well as harmful effects on animals and plants.

Inadequate absorption of UV radiation can lead to increased incidence of skin cancer and cataracts, as well as disrupt ecosystems and food chains. The protective role of the ozone layer is vital for maintaining the health of various life forms and ensuring the stability of natural biological processes. This function emphasizes the ozone layer's significance in maintaining life on Earth, rather than the other choices related to oxygen production, temperature regulation, or cloud formation.