Which is the best description of a shofar?

A shofar is a musical instrument that is made from the horn of a kosher animal, such as a ram or a kudu. It is often used in Jewish religious ceremonies and rituals, such as during Rosh Hashanah (Jewish New Year) and Yom Kippur (Day of Atonement), and is blown to signal the beginning of the New Year and to call people to prayer. The sound of the shofar is said to be a call to repentance and self-reflection.