The correct response to the question about how the author of Red Wolf uses the real experiences of children at Indian boarding schools to convey a message is:
The author uses details to describe the experience as it happens to show how harmful boarding schools were to Native children.
This choice reflects how the narrative illustrates the traumatic impact of boarding schools, as seen through the transformation of the character who grapples with his identity and experiences the emotional turmoil that results from his time at such institutions.