Answer: to describe the meaning of the shell strings.
In this excerpt, the author explains to us what the meaning of the shell strings is. He tells us that the shells symbolize the union of the nations. Option B is incorrect, as the passage does not discuss anything related to the consequences of disobeying one's tribe. Option C is similarly incorrect, as the passage does not mention any of the traditions of the Lords. Finally, the passage does not explain the history of each tribe.
Try replacing the word woman with any of those four words. Try to simplify the passage over all, and which ever one makes sense, is the right one. I'm assuming weakness is correct, because it says "therefore i forbid my tears" claiming they wont cry, and in this world, crying is a sign of weakness. But i would just get a few more opinions on it :)
Words which describes someone who is not likely to think of others are :- inconsiderate or nonchalance.
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