How does the reader know that Martha has experienced hardships before in her life in the store A Field of Wheat?

In "A Field of Wheat," readers recognize that Martha has faced hardships through her reflective thoughts and interactions with others. Her demeanor suggests a history of resilience, as she grApples with her current struggles while recalling past challenges. Additionally, her conversations often reveal a sense of longing and loss, indicating that her experiences have shaped her perspective and emotional state. These elements collectively underscore the weight of her past on her present life.