Which hindu god is know as 'the preserver'?

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.

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What are the most populous and least populous areas of russia? and why are some areas more heavily populated than others?