The author supported the central idea by illustrating the choice that Lewis took to tackle racism.
It should be noted that a central idea simply means the man idea that can be found in a literary work.
In this case, the main idea is about the black students who protested against racial segregation.
Learn more about central idea on:
brainly.com/question/2684713
Answer:
places,religions,movements,physical systems
Reconstruction era im so sorry im not sure but i think that's the answer