Why is antropology holistic?

Holism is the idea that all the properties of a given system cannot be determined or explained by its component parts alone. Instead, the system as a whole determines in an important way how the parts behave. Anthropologists look various aspects of humanity, from the physical (Biology) and cultural (archeology, linguistics), to the cross-cultural, looking at what it means to be human. Thus, what anthropologists mean by the holistic approach is the examination of all the aspects of humanity.