Answer:
Culture Anthropology
Explanation:
Anthropology is the study of humans living in the past and present.
Culture anthropology is anthropology that views human behavior from the perspective of a regions culture. In other words, the variation among humans in terms of culture is studied.
Here, Audrey Richards focused on the rituals of the Bemba. The rituals are a cultural tradition.
Hence, the question is referring to Culture Anthropology.