Review: In your own words, what is oppression?

What are the 4's of Oppression?

This is an example of

Which type of oppression is it? Why?
This is an example of
What is the purpose of this article?
What text structure(s) (description, compare & contrast, cause & effect, problem & solution, or sequence) is the author using to communicate the information? How do you know?
What is the purpose of including the "Background" section about this topic?
Why would the author include a graph? In other words, what effect does the graph have on the overall article?