Final answer:
Chlorofluorocarbons (CFCs) belong to the carbon cycle.
Step-by-step explanation:
The correct answer is d) Carbon cycle. Chlorofluorocarbons (CFCs) are fully or partly halogenated paraffin hydrocarbons that contain carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F). They are used as refrigerants, propellants, and solvents. While CFCs contribute to ozone depletion, they are not directly part of the nitrogen, phosphorus, or water cycles. Chlorofluorocarbons (CFCs) do not directly participate in natural cycles such as the nitrogen, phosphorus, water, or carbon cycles. They are man-made compounds primarily used in industrial applications such as refrigerants, propellants, and solvents. CFCs contain elements such as carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F). Although these elements are part of natural cycles, CFCs as a whole do not belong to any of the major biogeochemical cycles. However, CFCs can impact the carbon cycle indirectly, as their release into the atmosphere can contribute to global warming by trapping heat. Also, their degradation in the upper atmosphere leads to the depletion of the ozone layer, which affects all biogeochemical cycles by changing the amount of ultraviolet radiation that reaches the Earth's surface. Processes such as evaporation or nitrogen fixation do not involve CFCs directly.