Which statement best describes the ozone layer of Earth?

The ozone layer is a region of the Earth's stratosphere that contains a high concentration of ozone (O₃) molecules. Its primary function is to absorb a significant portion of the Sun's harmful ultraviolet (UV) radiation. By filtering and reducing the intensity of this radiation that reaches the Earth's surface, the ozone layer plays a crucial role in protecting living organisms, including humans, from potential adverse effects such as skin cancer, cataracts, and other health issues, as well as protecting ecosystems.

The other statements do not accurately represent the function or characteristics of the ozone layer. For example, the ozone layer is not associated with the prevention of severe storms, nor does it increase nitrogen in the atmosphere or contribute to the formation of a magnetic field in the mesosphere. These statements misattribute roles and functions that are outside the scope of what the ozone layer actually does.