What decision did mrs. till make that ignite action in the civil rights movement

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 is one reason why so many corporations prefer to incorporate in the state of delaware?

Name that largest artificial lake built in the 11th century