Which artery supplies blood to the back of the head?

The occipital artery is the correct answer because it specifically branches from the external carotid artery and is responsible for supplying blood to the posterior aspect of the scalp, including the back of the head. This artery provides oxygenated blood to the muscles and tissues in this area, which is crucial for maintaining their function and health.

In contrast, the frontal artery primarily supplies blood to the forehead and frontal regions of the scalp, while the temporal artery focuses on supplying the lateral aspects of the head, including the temples and part of the scalp above the ears. The cervical artery, which is a more general term, does not specifically denote a single artery with a direct role in supplying blood to the back of the head as the occipital artery does. Understanding these distinctions helps clarify why the occipital artery is the primary vessel providing blood to that specific area.