The study of biological anthropology varies in that some biological anthropologists study 1. extinct and living species of primates. 2. the interaction between domestic animals and disease. 3. potential for life on other planets. 4. changes in marine life.

The correct answer is 1

Biological Anthropology also called Physical Anthropology and is characterized by the anthropological study of human behavior through observation of the human being as well as evidence of behavior and biology of his ancestors, whether hominids or not.

Being a complex science it is easy to understand why Biological Anthropology is divided into subdisciplines. Among the branches of study are: Anthropometry, Paleoanthropology, Primatology, Osteology, Paleopathology and Genetics. The practices in this field can occur both in skeletal remains and in living people.