Question

Why was Franz sad? the last lesson class ninth ​

Answer 1

Answer:

Franz felt regretful and sad for not learning his mother tongue.

Answer 2

HERE IS YOUR ANSWER MATE

As a mark of respect to his hard work, the village men also attend his 'last lesson'. They are sad as they did not learn their mother tongue, French in their childhood. Franz is shocked to know that it's his last lesson, as he does not know French.