I think it is called sentence subject. Sorry if I am wrong.
Repetition is used because they state several times that they would do anything. And the other two are not rhetorical devices anyway.
Answer: emphasize that statewide changes depend on individual choices
Explanation: Writers frequently use subordination to signal an imbalance or inequality between ideas. In the sentence toward the middle of the final paragraph, the author uses the subordinate clause “if Wyoming is going to be a more diverse place” to identify a situation that could exist in the future. She then uses an independent clause to reveal the condition that must be met for this situation to exist—“people have to choose to live” there. By organizing the sentence this way, the author places an emphasis on what individuals must do in order to change the state of Wyoming as a whole.
Black?I think so. Or white.