Observe the diagram and answer the given question.
Which of the following activities decrease the amount of CO2 in atmosphere?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Photosynthesis
Option (1) Respiration — Incorrect. Respiration of plants, animals and decomposers releases CO2.
Option (2) Photosynthesis — Correct. Green plants on land and in water take in CO2 and fix it as organic matter.
Option (3) Burning of forests — Incorrect. Burning adds CO2 to the air.
Option (4) Combustion of fossil fuels — Incorrect. Burning coal, oil and gas also adds CO2.