Which of the following liqueurs has a licorice flavor?

Ouzo is a liqueur that has a distinct licorice flavor, primarily derived from anise. This characteristic flavor is a hallmark of ouzo, which is a traditional Greek spirit typically enjoyed as an aperitif. The production of ouzo involves distilling anise together with other botanicals, which contributes to its unique and aromatic profile. While it is often served with water, which turns it a cloudy white, the strong anise flavor remains the defining feature of this liqueur, making it easily identifiable.

In contrast, the other liqueurs mentioned do not share this licorice flavor. Amaretto is known for its almond or cherry notes, Triple Sec is a sweet and orange-flavored liqueur, and Peach Schnapps prominently features a peach taste, further highlighting the uniqueness of ouzo in the context of this question.