Answer: <u>Option B; photosynthesis</u>
Explanation: Carbon is present in the atmosphere in gaseous form as carbon dioxide majorly. And, only plants can take up CO2 and use it to make glucose. This reaction takes place through photosynthesis, taking place in the leaves of the plants. Rest activities mentioned in option A, C and D, these all release CO2 into the atmosphere.
I think because they work together, just search for their functions and you'll kmow how they are related to each other. Youtube might have a better explanation because teachers there is great.
Lungs, nose, airway, mouth, pharynx, larynx,trachea,bronchi, and bronchioles. Its three of those but thats all i could think of from the top of my head. Good luck
Peer review other scientist will check the findings before it gets published