Why are they clapping?

Gopal was a shy boy in sixth grade
His school had to be changed as his father was transferred
He used to sing well and won many prizes as well
So his father knew Gopal could get a seat in good school.

New school was of different meal
The ingredients he had to deal
To make himself comfortable
With new friends digestible.

The teacher introduced him as a singer
And clapping of fellow mates he could hear
So Gopal also started clapping
When a classmate gently nudged saying , “It is for you to sing.!”