Professor smith was interested in reporting the reality of the experiences of teenage runaways living on the streets in their own terms so he observed their life on streets and talked with them about their challenges and survival strategies. professor smith is probably most interested in:

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.

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.

i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

hope this

i am brianly

sorry if this doesn't