Which style of beer is described as tart and dry with low ABV, often served with flavored syrups?

The description of a beer that is tart, dry, with low alcohol by volume (ABV), and often served with flavored syrups aligns perfectly with Berliner Weiss. This style is a refreshing, German wheat beer known for its low alcohol content, typically between 2.5% and 4%. Berliner Weiss is characterized by its bright, tart flavor resulting from lactic acid bacteria during fermentation, giving it a distinct sourness that is both pleasant and refreshing.

Traditionally, Berliner Weiss is enjoyed plain or with flavored syrups, which can range from raspberry to woodruff, enhancing its flavor profile and making it more appealing, especially to those who may not typically enjoy sour beers. The style's effervescence and clean finish complement the tartness, making it highly thirst-quenching.

The other options do not fit the description as precisely: Kölsch is generally a clean, crisp beer with a mild flavor; Hefeweizen is a wheat beer known for its banana and clove aromas and has a higher ABV; and Altbier is a traditional German amber ale, malty in flavor and stronger in alcohol, lacking the pronounced tartness and low ABV characteristic of Berliner Weiss.