Final answer:
Based on the description, it is likely that Sarah is a practicing Jew, as evidenced by her religious practices and aspirations that align with Jewish culture.
Step-by-step explanation:
From the description provided, it can be determined that Sarah is likely a practicing Jewish individual due to the cultural and religious contexts mentioned such as fasting on Yom Kippur and the importance of the synagogue. The mention of the synagogue indicates a connection to Jewish worship which often involves reading Hebrew texts like the Torah. The aspiration to visit Jerusalem and see the Western Wall further emphasizes her connection to Jewish faith and culture.