Final answer:
An ethnographer is an expert who teaches a sociologist or cultural anthropologist about a particular aspect of local life.
Step-by-step explanation:
An ethnographer is an expert who teaches a sociologist or cultural anthropologist about a particular aspect of local life. This expert shares their knowledge and insights to help the ethnographer understand and interpret the cultural norms, behaviors, and practices of a specific community or society. For example, if an ethnographer is studying a tribe in the Amazon, an expert from that tribe could provide valuable information about the tribe's traditions, beliefs, and daily routines.