Final answer:
Applied anthropology is not one of the traditional four main fields of anthropology, which are biological, archaeological, cultural, and linguistic anthropology.
Step-by-step explanation:
The four main fields of anthropology are biological anthropology, archaeology, cultural anthropology, and linguistic anthropology. Therefore, the field that is not one of the four main fields of anthropology listed in the question is applied anthropology. While applied anthropology is an important branch of anthropology that refers to the application of anthropological methods and theory to solve real-world problems and issues, it is not traditionally counted among the four foundational subfields that form the holistic study of humanity from both a biological and cultural perspective.