Question

why did the postmaster become serious?​

Answer 1

Because he knows that Lencho has a strong faith in God and he don't want to shake his faith in God.

HOPE IT WILL HELP ✌ ✌ ❤

Answer 2

After reading the letter written by lencho to god, the post master became serious, because he saw the complete faith of lencho on God, that the god will help him in his bad times for sure. So, the postmaster himself collected the money and send 70 pesos to lencho.

Hope it helps.

Thanks.

Regards, Akash Kumar