What protects the earth from the ultra violet radiation of the sun?

Correct option is B

Correct Answer: B) Ozone

Explanation:
The ozone layer, located in the stratosphere, plays a crucial role in protecting life on Earth by absorbing the majority of the Sun's harmful ultraviolet (UV) radiation.

• UV radiation is categorized into three types: UV-A, UV-B, and UV-C.
• UV-C: The most harmful, but it is almost completely absorbed by the ozone layer and oxygen in the atmosphere.
• UV-B: Partially absorbed by the ozone layer, and excessive exposure can cause skin cancer, cataracts, and harm ecosystems.
• UV-A: Least harmful and is not absorbed by the ozone layer.
• The ozone (O₃) molecules absorb this radiation, converting it into heat and preventing it from reaching the Earth's surface.

Information Booster:

• Ozone Layer: Found in the stratosphere, between 10 and 50 kilometers above Earth.
  
• Ozone Depletion: Caused by chemicals like chlorofluorocarbons (CFCs), leading to issues like the ozone hole over Antarctica.
  
• Montreal Protocol (1987): An international agreement aimed at reducing the production of ozone-depleting substances.
  
• Consequences of UV Radiation: Skin cancer, cataracts, DNA damage in living organisms, and reduced crop yields.
  
• Ozone Recovery: Due to global efforts, the ozone layer is slowly recovering, with predictions of full recovery by the 2060s.

Thus, the ozone layer is essential for shielding life on Earth from the Sun's harmful UV radiation.