The correct option is A Reducing deforestation, cutting down use of fossil fuel
Deforestation is the clearing of the forest but forests are vital for human and animal lives as they are home to millions of species, prevent soil erosion, play a crucial role in water cycle by returning water vapor back into the atmosphere, absorb greenhouse gases that are emitted when fossil fuels are burnt. So if we reduce deforestation and cut down the use of fossil fuels then global warming can be controlled.