Biology

The correct answer is B.Atmosphere.

When humans burn fossil fuels (such as coal, oil, and natural gas), the carbon stored in these fuels combines with oxygen in the air during combustion, forming carbon dioxide (CO₂). This CO₂ is released primarily into the atmosphere, where it contributes to the greenhouse effect and global warming.

To clarify the options:

A.Water: While some carbon is absorbed by oceans, the immediate release of carbon dioxide from burning fossil fuels goes into the atmosphere.