The next step of B in the carbon cycle is decomposition. Option D
The continual natural process known as the "carbon cycle" includes the exchange of carbon between the soil, oceans, atmosphere, and living things. Carbon dioxide from the atmosphere is taken up by plants and algae through photosynthesis, where it is transformed into organic molecules.
After eating these plants, animals absorb carbon and absorb it into their tissues. Carbon is released into the atmosphere again during respiration and decomposition. Furthermore, dissolution and outgassing are two ways that carbon is transferred between the atmosphere and the oceans.