Answer:
Participant observation
Explanation:
Participant observation is an specific qualitative research method in which the researcher not only observes the research participants, but also actively engages in the activities of the research participants in order to attain a comprehensive understanding of the group and their needs and characteristics.
In this example, Jarod is doing research on the homeless. He has lived among them, sleeping on the street and engaging in their activities. This has helped him gather a broad understanding of the homeless and their needs. We can see that Jarod is not only observing the homeless but he is engaging in their activities and by being one of them he has attained a comprehensive understanding of them. Thus, he is using participant observation as a method of gathering data.