delegint restraining my answer so yeah
Answer:
I was caused by segregation between African Americans and Whites.
Explanation:
The civil rights movement is a period in america's history from around the early 50s to mid 60s. Everything had 2 areas. One for African American's and Whites. It was caused because Whites still believed they were the supreme race and that African American's were a lesser one. 1 significant event that led to the end of segregation was Dr Martin Luther King Jr's I have a dream speech.
I think oxygen and carbon dioxide i'm not sure though
The answer that will fit best in the question above is
gentrification. It is because this is the process of having to be able to do an
improvement or do some renovating in terms of a particular thing in which is a
way of developing something into a more middle class taste.