The correct answer is option 3: Chlorofluorocarbons (CFCs). Ozone holes are formed in the stratosphere due to the presence of certain chemicals that deplete the ozone layer. CFCs are one of the major contributors to the formation of these ozone holes.

Benzopyrene, mentioned in option 1, is not directly responsible for the formation of ozone holes. It is a polycyclic aromatic hydrocarbon that is released from incomplete combustion processes and is a known carcinogen.

Option 2, hydrocarbons, refers to a broader group of compounds that contain hydrogen and carbon atoms. While some hydrocarbons are capable of contributing to air pollution and indirectly impacting the ozone layer, they are not the primary cause of ozone hole formation.

UV radiation, mentioned in option 4, is not responsible for the formation of ozone holes. UV radiation is the energy from the sun that reaches the earth`s surface and is partially absorbed by the ozone layer. Ozone holes are caused by the depletion of ozone molecules due to certain chemicals like CFCs, not by the UV radiation itself.

Hence, the correct option is 3: Chlorofluorocarbons (CFCs) as they are primarily responsible