Answer: Comparison
Explanation:
Social comparsion could be defined as how individuals choose or place their social worth based on how they build against other people, mostly competition based, they do this as a way to booster self improvement, self motivation and how they are seen. This is practically observed in the political society where politicians build their social network to foster their image when running for a position or to hold a post in the political party.
William decision to join Young Republicans club was to build his image or reputation due to his passion for politics.