Final answer:
The relationship between Kya and Pa changed due to Kya's discovery of her mother's belongings, revealing new insights into their family dynamics.
Step-by-step explanation:
The event that changed the relationship between Kya and Pa in the story involved Kya's discovery of her mother's belongings (Option B). This discovery is significant as it often represents a turning point in a character's understanding of their family history and dynamics, potentially uncovering emotional truths and leading to new insights into their parents' lives. Such events in a story can alter the relationship dynamics between characters, as shared histories and secrets come to light. While the provided context about Inayah's experience at her new school is informative, it is not directly related to the question about Kya and Pa's relationship.