Final answer:
The Greater Auricular Nerve (C2, C3) innervates the skin over the parotid gland, angle of the mandible, and parts of the ear, arising from the cervical plexus.
Step-by-step explanation:
The Greater Auricular Nerve, which includes the C2 and C3 spinal nerves, provides cutaneous innervation primarily to the skin over the parotid gland, the angle of the mandible, and parts of the ear including the earlobe. This nerve arises from the cervical plexus, characterized by the presence of both sensory and motor fibers. The sensory fibers from the Greater Auricular Nerve come from sensory neurons in the dorsal root ganglia and enter the spinal cord through the dorsal nerve root.