D. The study of a society and its natural environment.
Explanation:
It is the study of human adaptation to social and physical environments. It is a part of a social science theory that gives scholars a way to think why people do what they do in a particular region.
The central argument of this theory is that the natural environment is a major contributor to social organization and other human institutions. We affect the environment and this one is affected by us too.
The definition of cultural ecology is <em>the study of human adaptations to social and physical environments, </em>so I would say the correct answer is D) the study of a society and its natural environment.
