Final answer:
Anthropologists choose a broad subject of study because the holistic approach of anthropology helps them understand the interconnectedness of various aspects of society and uncover hidden patterns and forces.
Step-by-step explanation:
Anthropologists are driven to choose such a broad subject of study because of the unique perspective and methodology that anthropology offers. Anthropology is the study of humanity across time and space, encompassing every possible realm of human experience, thought, activity, and organization. By taking a broad view, anthropologists are able to understand the interconnectedness of various aspects of society and how they shape the cultures they study. This holistic approach allows anthropologists to uncover hidden patterns and forces that may not be apparent when studying a single realm in isolation.