I’m not sure but it might be the third one
Answer:
B is the correct answer.
Explanation:
The sensory receptors in the nose send signals to the olfactory bulb. These signals are then processed by the brain, which sends a response. Olfactory bulb is the one that receives olfactory(relating to the sense of smell) information which is then relayed to other parts of the brain.
The correct processes and components of the carbon cycle is given in the image attached .
The answer is the second one. Good luck!!