How do fossil fuels play a role in the carbon cycle?

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

Fossil fuels require a lot of carbon to burn, which releases carbon into the atmosphere.