Why was it necessary to protect malaun fort?

Bonus question: according to wikipedia, in chinese philosophy yin and yang "describes how seemingly opposite or contrary forces may actually be complementary, interconnected, and interdependent." what are some examples from the story that amy tan may have intentionally incorporated elements of yin and yang philosophy into this story? select 2.

Sociology is best described as the systematic study of

How did ancient civilizations develope its agriculture and protect its population