CBSE ENGLISH LANGUAGE & LITERATURE

Detailed explanation-1: -The boy was playing with his ball. The ball bounced and it went down the street. From the street the ball fell into the water. This is how the boy lost this ball.

Detailed explanation-2: -The boy has lost his ball. It has fallen down into the harbour. It will not be found back again. However, through the metaphor of the lost ball, the poet wants to highlight a bigger loss.