Which purpose setting activity uses lists of words to be clustered by the students in order to illustrate relationships among ideas?

These are semantic maps. These maps give the students the ability to link the words or concepts together by similar meanings or related ideas. The concepts are given a visual form so as to make it easier for students to "see" the relationships instead of having to simply memorize them.

The answer is society was a caste like system with poor whites at the bottom of the white social ladder.