The ___ of a skeleton can be determined by observing the shape of the pelvis and sacrum, the size of the cranium, and the protrusion of the brow bone and mastoid process.

The answer is AGE.

In forensic anthropology, the age of a skeleton can be determined by:

-the shape of the pelvis and sacrum (this could also determine the gender)

-the size of the cranium (the joints or fontanels in the cranial bones become smaller with age)

-the protrusion of the brow bone and mastoid process.

- teeth (the lack of it indicates old age)