Which of the following factor contribute to the depletion of the ozone layer?

Chlorofluorocarbons (CFCs) are the primary factor for the thinning of the ozone layer. CFCs are chemical compounds that were commonly used as refrigerants, solvents, and propellants in aerosol sprays. When CFCs are released into the atmosphere, they can drift up into the stratosphere, where they are broken down by ultraviolet (UV) radiation from the sun. The breakdown of CFCs releases chlorine atoms, which can then react with ozone molecules and break them apart. This process can lead to a depletion of the ozone layer.