- A Oxygen (O2) and nitrogen (N2)
- B CO2, CH4, N2O, and water vapor
- C Carbon dioxide (CO2) mainly
- D Oxygen (O2) gas mainly
Correct answer: B. CO2, CH4, N2O, and water vapor
Explanation: Greenhouse gases (CO2, methane, N2O, H2O vapor) trap heat in the atmosphere, causing the greenhouse effect.
Concept context
Levels of biodiversity, species richness patterns, threats (HIPPO), and conservation strategies. Always in NEET.