Final answer:
Extreme hunger in people with diabetes is likely caused by inadequate insulin release, preventing glucose absorption by cells, which leads to a lack of energy production and triggers hunger signals. Therefore, the correct option is a.
Step-by-step explanation:
People with diabetes often experience symptoms of extreme hunger due to the improper utilization of glucose within their body. For individuals with diabetes mellitus, a likely cause of extreme hunger is option 'a', which states that the release of insulin is inadequate and as a result, glucose cannot be absorbed by cells and metabolized to produce energy.
In cases like type 2 diabetes, although insulin may be produced, it is not effectively used by the body. This scenario is often described as 'starving in a sea of plenty' because the cells in the body are unable to absorb the high levels of glucose present in the blood. Consequently, despite the abundance of glucose, the body's cells are malnourished and signal hunger as they are not receiving the energy they need.