Why do they toss bread into the water during Tashlikh?

During Tashlikh, a Jewish ritual performed on Rosh Hashanah, bread is tossed into water as a symbolic act of casting away sins. The bread represents the sins and shortcomings of the previous year, while the flowing water signifies the cleansing and renewal that comes with the new year. This act serves as a physical reminder of the desire for repentance and a fresh start. It embodies the hope for spiritual cleansing and the opportunity for personal growth in the coming year.