Final answer:
Burning of fossil fuels increases carbon in the atmosphere.
Step-by-step explanation:
The correct answer is B. burning of fossil fuels.
When fossil fuels such as coal, oil, and natural gas are burned, they release carbon dioxide (CO2) into the atmosphere. This process is known as combustion.
Burning fossil fuels is a major contributor to the increased amount of carbon in the atmosphere, which is a significant factor in climate change.
Learn more about carbon emissions