Gentry is writing a report about the popularity of the community boxing club for the youth. He includes information about one boy who is described as pugnacious, which reference would help getting a tree understand the description of the athlete.

To help the reader understand the description of the pugnacious athlete, Gentry could include a reference to a specific incident or behavior that exemplifies the boy's pugnacious nature. This reference could provide specific details about his attitude, actions, or demeanor in the context of the boxing club.