Final answer:
Biological anthropologists study nonhuman primates to understand our shared anatomy, behavioral patterns, and genetic relationships, as we share a significant portion of our DNA with them.
Step-by-step explanation:
Biological anthropologists study nonhuman primates because they share anatomy, behavioral patterns, and are our closest kin. Nonhuman primates and humans share a significant portion of their DNA, as well as many genetic and behavioral characteristics.
Through the field of primatology, which investigates the biological and social traits of primates, biological anthropologists aim to understand the origins and evolution of humans. Primates, such as gorillas and chimpanzees, share over 97% of their DNA with humans, reflecting our close evolutionary ties. The insights gained from studying primates extend to understanding human intelligence, culture, and the effects of environmental challenges on primate species.