Answer:
Participant-as-observer
Explanation:
Participant-as-observer: The participant-as-observer is a method of observation in which the experimenter or researcher himself or herself is the member of a particular group being studied, and the group being studied is informed about the research activity or they are aware of it. In this scenario, the researcher usually interacts with the participants of the group.
Participant observation is a type of data gathering method used in ethnography and qualitative research.