1) which branch of science allow researchers to piece together details about ancient skeletons? 2) how can the clavicle be used to tell age? 3) how do pelvic bones reveal gender? 4) what can isotopes in tooth enamel and bones tells us?

1. Osteology

Clavicle can be use to determine the age of a person by measuring it's length when it stop growing. It is the last bone that grow at age 25.

3. Pelvis can be use to determine sex of an individual.

The female pelvis has space for birth canal while the male pelvis does not have.

4. Isotopes in human tooth enamel or bones can tell us about changes in dietary shift or dietary life history of an individual.

Explanation:

Osteology is the scientific study of bones, skeletal elements,teeth's, morphology, function, diseases and bones resistance.

Clavicle or collar bone is the long bone between the shoulder blade and sternum. This comprises of the shoulder girdle.

It is the first bone to begin ossification during embryonic development and it developed in humans between 21 to 25 years of age.