Biological anthropology

Physical anthropology began primarily with studies of primate fossils in history, their comparison and contrast, why and when certain traits such as mandible and chin evolved or disappeared, nature and environment on walking (bipedal or not), how the environment and resources affected the fossil primates and did they use fire or not. It also primarily deals with primate classification in the hominid tree and inclusion or exclusion of fossil evidence to and from the hominid tree and the individual naming of the proposed species.

It also studies why a species likely disappeared or diverged from each other in evolution. Particularly what change occurred that affected the individuals to evolve similarly or differently. Therefore physical anthropology closely works with paleoanthropology and the physical evidence since you need a tangible material to prove or disapprove something. It also focuses on fossil dating.