How is Aziza changing in the orphanage?

Aziza develops a stammer which suggests her suffering and internal pain. Though it seems as if she is well taken care of within the orphanage walls, it must be difficult to acknowledge that her parents were willing to send her out of the house. Additionally, though she may be be better off in the orphanage than she might have been in the house, all of Afghanistan is suffering and her fate is no different regardless of where she remains.