Why does Beah flashback to his grandmothers village at the end of the excerpt?

Beah's flashback to his grandmother's village at the end of the excerpt serves to provide a contrasting moment of peace and happiness in contrast to the violence he has experienced. It highlights the innocence and simplicity of his childhood before the war, emphasizing the contrast between his past and present experiences. Additionally, it serves as a moment of reflection on his roots and the sense of loss he feels due to the destruction of his homeland.