Answer:
They didn't want their children to go to school with a black child. Ruby showed bravery by walking to school with federal marshals who were there to keep her safe. She showed bravery by going to school each day even though many white parents didn't want her there.
Explanation:
The answer to this question is 4. Industrialization caused urbanization and a population boom.
It was the belief that it was destiny for the Caucasians to expand and to take over North America. This caused conflicts when the Caucasians wanted to take land from the native Americans.
