The correct answer is (b), nitrogen.
Greenhouse gases are gases that trap heat in the atmosphere, causing the planet to warm. The main greenhouse gases are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.
Nitrogen is not a greenhouse gas because it does not absorb infrared radiation. It is the most abundant gas in the atmosphere, making up about 78% of the air. Nitrogen is essential for life, as it is used by plants to create proteins and other molecules.
Carbon dioxide is a greenhouse gas that is produced when fossil fuels are burned. It is also released when trees are cut down and when soil is disturbed. Carbon dioxide is the main greenhouse gas that is causing climate change.
Methane is a greenhouse gas that is produced by the decomposition of organic matter. It is also released from livestock, landfills, and natural gas leaks. Methane is a more potent greenhouse gas than carbon dioxide.
Nitrous oxide is a greenhouse gas that is produced by agriculture, fossil fuel combustion, and industrial processes. It is also released from the breakdown of fertilizers in soil. Nitrous oxide is a more potent greenhouse gas than carbon dioxide.
Ozone is a greenhouse gas that is found in the stratosphere. It is created when ultraviolet radiation from the sun splits oxygen molecules. Ozone protects life on Earth by absorbing ultraviolet radiation.
Chlorofluorocarbons (CFCs) are greenhouse gases that were once used in refrigerators, air conditioners, and aerosol cans. They are now banned because they damage the ozone layer.
I hope this helps!