The carbon cycle maintains the balance between the organic remains and carbon dioxide. In this cycle the the incorporation of carbon dioxide inside the plants by photosynthesis occurs and it is returned to the atmosphere by the process of respiration as well as the decaying dead organisms.
Two important natural processes that release carbon into our atmosphere are photosynthesis and respiration.
D
Since diabetics cannot produce insulin properly, in the diagram, the step “Pancreas releases insulin” wouldn’t happen and because of that, diabetics would not be able to uptake glucose or form lipids/glycogen.