In the novel "Where the Crawdads Sing," the mother's ashes represent a significant symbol of connection and closure for the main character, Kya. They serve as a reminder of her mother's presence and love, even after her passing. The ashes also represent a sense of finality and the completion of a chapter in Kya's life. They hold both emotional and symbolic value for Kya as she navigates her journey of self-discovery and resilience.