Which one of the following gases is the primary cause of the 'Greenhouse effect' (warming of the…

Carbon dioxide (CO₂) is the primary anthropogenic greenhouse gas responsible for the greenhouse effect and the warming of the Earth's surface, accounting for the largest share of heat-trapping emissions from human activities such as burning fossil fuels and deforestation. It absorbs and re-emits infrared radiation in the atmosphere. While nitrous oxide (N₂O) is also a greenhouse gas, it is present in much smaller concentrations and contributes a far smaller share of total warming than carbon dioxide, whereas nitric oxide, nitrogen dioxide, and carbon monoxide are not direct greenhouse gases.