Why was the economy in the North considered industrialized?

Articles of the confederation is a good representation of a system of government.

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.

What are three voluntary behaviors that is not control by results?