Is the boy who harnessed wind a biography?

No, "The Boy Who Harnessed the Wind" is not a biography. It's a memoir.

Here's why:

* Biography: A biography is written by someone other than the subject of the book. It tells the story of someone's life based on research and interviews.

* Memoir: A memoir is written by the subject of the book themselves, focusing on personal experiences and reflections.

"The Boy Who Harnessed the Wind" is written by William Kamkwamba, the young boy who built a windmill to power his village in Malawi. He recounts his own experiences and struggles in the book, making it a memoir.