“a long walk to water” what do you think is the author’s purpose of telling nya’s story first in each chapter answer

In my opinion, the author chose to present the story in this way because Salva, who has already lived in similar circumstances is going to change Nya's life.

Explanation

Dr. Slone betrayed us in Fort nite yesterday because of Kevin the Cube. Slone didn't want Kevin to be on the island again because he would destroy it.