Why is Through the Tunnel a coming-of-age story?

"Through the Tunnel" is a coming-of-age story as it follows the protagonist, Jerry, on his journey from childhood to adolescence. The narrative centers around his desire to prove himself and gain independence, symbolized by his determination to swim through an underwater tunnel. As he confronts physical and emotional challenges, Jerry learns about perseverance, self-discovery, and the complexities of growing up. Ultimately, the experience transforms him, marking a pivotal moment in his transition to maturity.