The correct option is B Lungs of the planet
Plants absorb carbon dioxide during the process of photosynthesis and release oxygen into the atmosphere. In the same way, our lungs absorb carbon dioxide from the blood and infuse it with oxygen. Amazon rainforest in located in South America. It is the largest and most diverse tropical rainforest on earth, covering an area of five and a half million square kilometres and is abundant in green plants. This forest, therefore, acts as earth’s air purifiers by absorbing the large amounts of carbon dioxide from the atmosphere. Thus the correct answer is option B.