Answer: c) participant observation.
Explanation:
Participant observation is the qualitative research mechanism through which researchers get involved in the research activity along with the participants for studying and observing.It gives comprehensive understanding to researcher.It is usually carried out in field of sociology and anthropology.
According to the question,John is using participant observation as he is becoming a part of research along with homeless people to keenly observe the process and collect data on basis of that.
Other options are incorrect because secondary data analyzation, comparative research and qualitative technique are not used by investigator to become a part of research along with participants.Thus,the correct option is option(c).
<span>After settling in India, the Aryans stopped being pastoral nomads and became farmers. The creation of the iron plow and the use of irrigation made it possible for them to turn the jungle along the Ganges River into farmland. The basic crops in the north were wheat, barley, and millet. Rice was grown in the river valleys. Grain and vegetables were grown in the south. Cotton and spices such as pepper, ginger, and cinnamon , were also grown.
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Because their skin is dark and society calls anybody with dark skin "black"
the answer is A Reserved Power
