Is humour necessary?

Today we have opened our class with a question that the teacher has made to us: What opportunities can we create do laugh?

Answering the question I think that some things in our world are funny, but there are people that don't know to see it, these people usually are very sad.

In contrast there are a lot of funny people, as me that I laugh for all, and these people find more opportunities to laugh. For this reason we say that "laughter is the best medicine" and also it's necessary to be a little happy.

In conclusion, humour is a part of our life because this part makes us to be better persons.