The conflict represented as Yun Ok attempts to collect a whisker from the tiger is:
Character vs. nature
The best example of a primary source among these options that you've mentioned is an interview with her dad who is a Vietnam veteran. She can get all the details she needs from a person who was actually there.
So much is at stake in writing a conclusion. This is, after all, your last chance to persuade your readers to your point of view, to impress yourself upon them as a writer and thinker. And the impression you create in your conclusion will shape the impression that stays with your readers after they've finished the essay.
It explains that Romeo and Juliet will face many obstacles because of their families' hatred.
