Final answer:
The subject of this question is "Participant Observation", a research method used in the social sciences that involves immersing researchers in a group or setting to observe and study behavior.
Step-by-step explanation:
The subject of this question is “Participant Observation”, which is a research method used in the social sciences. It involves researchers immersing themselves in a particular group or setting to observe and study the behavior and interactions of its members. The researchers may adopt a covert role, where they don't reveal their true identity or purpose, in order to gain access to authentic and natural behaviors.