Answer: A. photosynthesis
The use of fossil fuels will emerge gases like carbon monoxide and carbon dioxide into the atmosphere, clear cutting will also promote the abundance of carbon dioxide into the atmosphere as plants and trees are the carbon sinks, controlled burns or combustion will also emit toxic carbon compounds into the atmosphere.
Photosynthesis is the process which can help in counteracting these human interactions as the plants absorb carbon dioxide from the atmosphere along with the water and sunlight to produce their food in the form of carbohydrate (glucose) and oxygen.
