Answer: CFCs (chlorofluorocarbons).
- A Carbon dioxide (CO2)
- B CFCs (chlorofluorocarbons)
- C Oxygen (O2) gas
- D Methane (CH4) gas
Correct answer: B. CFCs (chlorofluorocarbons)
Explanation: CFCs (chlorofluorocarbons from refrigerants and aerosols) release chlorine in the stratosphere, catalytically destroying ozone (O3).
Energy pyramid showing a simple food chain (producer to herbivore to carnivore) with energy decreasing roughly tenfold at each trophic level.
Concept context
Ecosystems, food chains, energy flow, nutrient cycles, biodiversity, and conservation.