M. Hamel, the teacher in the story "The Last Lesson" written by Alphonse Daudet, blamed parents for not sending their children to school. The story is set in a small village in Alsace, France, during the time when the German government had taken over the region and imposed German as the official language of instruction.

Explanation:

Heading 1: The Context of the Story
- The story is set in a small village in Alsace, France.
- German government had taken over the region and imposed German as the official language of instruction.
- The story is about the last French lesson taught by M. Hamel before he leaves the village.

Heading 2: M. Hamel's Blame
- M. Hamel, the teacher, blamed parents for not sending their children to school.
- He said that parents were more interested in making their children work in the fields, tend to the cattle, and earn money instead of sending them to school.
- He was disappointed that the parents did not realize the importance of education and the French language in their lives.

Heading 3: Importance of Education
- M. Hamel emphasized the importance of education and the French language.
- He said that the French language was a part of the country's identity and heritage.
- He regretted that the students did not realize the value of education until it was too late.

Conclusion:
In conclusion, M. Hamel blamed parents for not sending their children to school because they did not realize the importance of education and the French language. He emphasized the significance of education and regretted that the students did not realize it until it was too late.