It appears that the key options for us to select the answer were not included, but I hope this response is useful. The most fitting explanation for how a stimulus’ intensity is conveyed to the central nervous system from sensory nerves is this: when the stimulus’ strength increases, the frequency of action potentials also rises. Hope this assists.
The solution is Nasogastric Intubation, as it involves inserting a tube through the nose into the stomach to facilitate eating.