Which row is correct about the carbon cycle?
- Aprocess for removing carbon dioxide from the atmosphere: photosynthesis; process for returning carbon dioxide to the atmosphere: combustion of hydrocarbons
- Bprocess for removing carbon dioxide from the atmosphere: photosynthesis; process for returning carbon dioxide to the atmosphere: cracking of hydrocarbons
- Cprocess for removing carbon dioxide from the atmosphere: respiration; process for returning carbon dioxide to the atmosphere: combustion of hydrocarbons
- Dprocess for removing carbon dioxide from the atmosphere: respiration; process for returning carbon dioxide to the atmosphere: cracking of hydrocarbons