Final answer:
Participant observation is mostly subjective as the researcher relies on their interpretations and experiences to gather qualitative data.
Step-by-step explanation:
Participant observation is mostly subjective as a method of inquiry. This is because the researcher immerses themselves in the environment they are studying and actively participates in what they are observing. They rely on their own interpretations and experiences to gather qualitative data, which is subjective in nature. For example, a researcher pretending to be a homeless person might document their personal experiences and observations, which are influenced by their own perspective and bias.