Answer:
Ethnography
Explanation:
Professor Smith's report had to do with describing the customs, mutual differences and habits of the teenage runaways and these attributes have to do with ethnography. Ethnography has to do with methods which describe qualities that are employed in the social science of dealing with the observation of social interactions and practices. It's ethical as it allows the researcher to observe without applying any deductive framework while allowing the cases to be seen as peculiar.