Final answer:
The area at the back part of the neck below the occipital bone is known as the nape, which is the correct answer to the question.
Step-by-step explanation:
The occipital bone is a critical structure at the back part of the skull. This bone forms the posterior base of the cranial cavity and has several features important for its attachment to other structures in the head and neck. Specifically, the external occipital protuberance and the superior nuchal lines are associated with the attachment of neck muscles. The nape, which is the term you are looking for, is defined as the area at the back part of the neck consisting of the hair below the occipital bone. Therefore, the correct answer to fill in the blank is:
The Nape area is defined as the area at the back part of the neck and consists of the hair below the occipital bone.