Answer: CFCs (chlorofluorocarbons).
- A Carbon dioxide (CO<sub>2</sub>)
- B CFCs (chlorofluorocarbons)
- C Oxygen (O<sub>2</sub>) gas
- D Methane (CH<sub>4</sub>) gas
Correct answer: B. CFCs (chlorofluorocarbons)
Explanation: CFCs (chlorofluorocarbons from refrigerants and aerosols) release chlorine in the stratosphere, catalytically destroying ozone (O<sub>3</sub>).
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.