Final answer:
The hypoglossal (XII) nerve is classified as motor according to function. It controls the muscles of the tongue and is crucial for speech and swallowing.
Step-by-step explanation:
The hypoglossal (XII) nerve is classified as motor according to function. This means that its main role is to control the muscles of the tongue, except for the palatoglossus muscle which is controlled by the vagus nerve. The hypoglossal nerve allows for movements of the tongue and is important for speech, swallowing, and other functions related to the tongue's movement.