Concept:The ozone layer in the stratosphere absorbs most of the Sun's harmful ultraviolet (UV) radiation, protecting life on Earth.Explanation:The ozone layer is a region with high concentration of O₃ in the stratosphere. It acts like a blanket that absorbs UV radiation. UV radiation is part of sunlight and can damage living cells. Two main types are UV‑A and UV‑B. UV‑B is more harmful and is mostly absorbed by the ozone layer. UV‑A is less absorbed and penetrates deeper. The table below shows their differences: