Concept:Carbon dioxide is the most important greenhouse gas because it traps heat in the Earth’s atmosphere, driving the greenhouse effect.
Explanation:Greenhouse gases absorb infrared radiation and re-emit it, warming the planet.
Among the given options, only carbon dioxide has this heat-trapping property.
Oxygen, nitrogen, and argon are not greenhouse gases — they do not absorb and re-emit infrared radiation significantly.
Human activities, especially burning fossil fuels and deforestation, release large amounts of carbon dioxide.
This excess COâ‚‚ thickens the atmospheric blanket, causing global temperatures to rise.
Other greenhouse gases include methane and nitrous oxide, but carbon dioxide is the primary one linked to climate change.
Thus, in this question, the correct gas is carbon dioxide.
Answer:Carbon Dioxide (Option C)