Answer:
A. It is getting thinner, allowing more harmful ultraviolet rays to reach Earth.
Step-by-step explanation:
The ozone layer is a region of the Earth's stratosphere that absorbs the Sun's ultraviolet radiation. Therefore, the ozone layer acts as a protective shield. However, the ozone layer is getting thinner, and this phenomenon is particularly evident in Antarctica. This means that harmful rays are able to better reach Earth. The main cause of ozone depletion is the release of harmful chemicals into the atmosphere.