The narrator's intrinsic motivation is shown through sentimental actions like reconditioning the piano and preserving her mother's belongings for personal emotional reasons.
The intrinsic motivation of the narrator is evidenced by actions taken out of personal sentiment and emotional significance rather than external rewards or pressures. Specifically, when the narrator mentions having the piano reconditioned for purely sentimental reasons, after her mother's death, it indicates an intrinsic desire to preserve memories and honor her mother's legacy.
Similarly, taking care to store jewelry and handmade sweaters, despite disliking their colors, and choosing to keep her mother's silk dresses close by rubbing them against her skin before wrapping them up, reflects a personal, emotional connection to these items.
These actions are not motivated by praise, recognition, or any external reward; they are driven by the narrator's internal feelings of love, nostalgia, and grief.