Final answer:
The correct answer is D. Participant observation. It is a research method in which an ethnographer actively participates in various aspects of a community's social life.
Step-by-step explanation:
The correct answer is D. Participant observation. Participant observation is a research method in which an ethnographer actively participates in various aspects of a community's social life, such as food production, religious and political activities, and family life. By immersing themselves in the culture, the ethnographer can gain a deep understanding of how people live and the cultural practices they engage in.