That would be a graph. Graphs are used to present calculations, basically anything that is numerical can be represented on a graph.
Given the conditions, the closest answer would be conventions. Word choice is using colorful language such as heavy adjectives and replacement of better words. Sentence fluency deals with fragment sentences or run-ons. Ideas deal with the main topic of an article or essay, etc.
Answer: It provides an illustration of the challenges African Americans of the time had to face.
Explanation: Look to the sentences Before & After the phrase. This explains that there was still difficulty even in the North.
I would think that this means that every one is effected differently or impacted in a different way.Here is an example some people are scared of the dark and think that there is evil within the dark and some people are like ehhh the lights are just off ope this helped :)
