Which of the following best defines 'ethnography'?

The definition of 'ethnography' as a detailed description of a culture based on fieldwork findings accurately captures its essence in cultural anthropology. Ethnography involves immersive fieldwork, where anthropologists observe and engage with a community or culture in order to gather qualitative data. This process allows researchers to gain deep insights into the daily lives, beliefs, and practices of the people they study, resulting in rich, nuanced descriptions of that culture.

Ethnography is distinct in its focus on firsthand experiences and participant observation, enabling anthropologists to document cultural practices and social dynamics in a comprehensive way. This approach provides a foundation for understanding the complexities of human societies as seen from an insider's perspective.

While other options touch on related themes within anthropology, they do not encompass the specific methodology and focus that define ethnography. For instance, the study of human biological evolution pertains more to physical anthropology, and comparing different cultural practices would fall under cross-cultural analysis rather than the immersive and descriptive nature of ethnography. Thus, the correct answer aligns perfectly with the primary goal of ethnographic research.