The correct answer is (b) Chlorofluorocarbons.
Chlorofluorocarbons (CFCs) are a group of man-made chemicals that were once widely used in refrigerators, air conditioners, and aerosol cans. CFCs are very stable and do not break down easily in the atmosphere. When they reach the stratosphere, they are broken down by ultraviolet radiation and release chlorine atoms. These chlorine atoms react with ozone molecules, destroying them.
Ultraviolet rays are a type of electromagnetic radiation that is emitted by the sun. They are shorter in wavelength than visible light and can cause skin cancer and other health problems. However, ultraviolet rays are also essential for the production of vitamin D, which is important for bone health.
Carbon dioxide is a greenhouse gas that traps heat in the atmosphere. It is released into the atmosphere when fossil fuels are burned. Carbon dioxide is a major contributor to climate change.
None of the above is not the correct answer.