Final answer:
Playing the piano helps Reem find peace and healing, just like Ji-Hae Park found solace in music which helped her recover from depression.
Step-by-step explanation:
In the passage Piano Obsession, playing the piano has the effect of helping Reem discover a way to achieve peace and healing. This is similar to the experience of Ji-Hae Park with the violin, where music helped her overcome severe depression and find a new purpose in bringing the wonder of music to others, rather than just aiming to perform in prestigious concert halls. Reem's experience with the piano likely provides a sense of comfort and a therapeutic escape from any hardships she faces.