Please tell me if the commas and the periods are in the right place and if not where do they go thanks

hai luv, I learned that the coma is behind the starting thing. Sorry, that's not the best explanation but this is what I found is correct. "Back in those days, white people and colored people were separated for everything they did in life and were treated differently because of the color of their skin."

interdependence is when all participating groups and individuals depend on each other. if you depend on one anothers goods, you end up trading in order to get the items you're looking for. (for ex: if i have food and you have water, we trade in order to depend on each other to live)

number 4. should be the correct answer