How do fossil fuels play a role in the carbon cycle

Positive are rich in common and burning them returns Carbon to the soil
Fossil fuels are rich in carbon and burning it releases carbon until the atmosphere
Fossil fuels require a lot of carbon to burn which takes carbon out of the atmosphere
Fossil fuels require a lot of carbon to burn which releases carbon into the atmosphere

The correct answer is: Fossil fuels require a lot of carbon to burn which releases carbon into the atmosphere.