D.
It means to make. For an example, "I'm going to suffix some pie".
Answer:
While a dictionary is not supplied in this question, <em>harrow</em> means to cause distress. hope this helps :)
This website has information on forms of Human observation to be pretty broad. It doesn't have anything specific with Bolivian villagers or there looms.
http://www.psychologydiscussion.net/behaviour/7-methods-of-studying-human-behaviour/540