Final answer:
Jerry from 'Through the Tunnel' is battling his own fear and self-doubt, making this a story about personal growth rather than a physical fight with an external entity.
Step-by-step explanation:
In the story Through the Tunnel, Jerry is fighting against his own fear and self-doubt. The struggles he faces are symbolic and pertain to his personal growth and independence. He is not battling any physical enemy, such as another kid, the sea itself, or a fictional creature like a sea monster.
The narrative conveys a psychological journey for Jerry as he aims to overcome his internal struggles and achieve a goal he has set for himself, demonstrating his transition from childhood to adulthood. In the descriptions provided, such as 'a boy who doesn't dare stay in the village' and 'imagining dangers out of nothing', we see the theme of battling internal fears rather than tangible external forces.