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
The answer is b because it polar bears will be in a non fiction story and periodical is a magazine or newspaper published at regular intervals.
Statement , your just stating something.
Answer:
<h2>Option c) ,indeed, </h2><h2>Explanation:</h2><h2>;is used when listing </h2><h2>e.g</h2><h2> there are ; pen ,book... and bags </h2>
