Which is a key characteristic of Riesling?

The key characteristic of Riesling being high acidity and floral aromas is significant because it highlights the grape's unique profile. Riesling is renowned for its ability to maintain high acidity even in warmer climates, which is crucial for balancing sweetness and providing freshness to the wine. This acidity allows Riesling to age well and enhances its vibrant character.

Additionally, floral aromas, often reminiscent of jasmine or orange blossoms, are commonly associated with Riesling, contributing to its aromatic complexity. These traits make it a versatile grape, suitable for producing a range of wine styles from dry to sweet, and a favorite among wine aficionados for its expressiveness and ability to reflect terroir.

The context of other options serves to illustrate how they do not align with the established characteristics of Riesling. For instance, low acidity and earthy notes would suggest a profile more typical of other varietals, while full-bodied and spicy notes align more with varietals such as Syrah or Zinfandel. Medium sweetness and dark fruit flavors might hint at varieties like Merlot or certain styles of Cabernet Sauvignon, which are distinct from the hallmark features of Riesling.