Final answer:
Physical anthropology has three main fields: human evolution, primatology, and human biology. Human evolution focuses on human and primate evolution, while primatology examines nonhuman primates and human behavior. Human biology studies physical variations in humans.
Step-by-step explanation:
Physical anthropology is one of the four major subfields of anthropology. It has three main fields: human evolution (paleoanthropology), the study of nonhuman primates (primatology), and the study of human biological variation (human biology). Human evolution focuses on the study of human and primate evolution, including the origins of humans, while primatology examines nonhuman primates to gain insights into human behavior and evolution. Finally, human biology studies the physical variations in humans, such as genetics and biological adaptations.