Answer:
The value that defines when Jerry finally swims through the tunnel is determination.
Step-by-step explanation:
"Through The Tunnel" is a short story written by Doris Lessing. The story is about a young boy named Jerry, who has lost his father and is out on a vacation with his mother to start afresh.
After being rejected by the older boys, Jerry feels humiliated and determined to prove his manliness and independence. So, when he decides to go through the tunnel which was used by the older boys, he chooses to prove himself not only to the boys but to himself. When Jerry finally decides to go through the tunnel, after practising to hold his breath, the value he reflects is of determination. His decision of going through the tunnel shows his determination.