What are the acidity, tannin, and flavor characteristics expected from a Nebbiolo-based wine?

The characteristics of a Nebbiolo-based wine are indeed defined by high acidity and high tannins, which contribute to the wine's structure and aging potential. This grape variety is known for producing wines that exhibit pronounced flavors of red fruits, particularly red cherry and red plum. Additionally, Nebbiolo wines are often noted for their complex aromatic profile that can include floral notes like violet, as well as earthy hints and herbaceous elements, such as dried herbs.

The high acidity in Nebbiolo helps to balance its robust tannins, making it a food-friendly wine that can age well, often developing more complexity over time. This is why Nebbiolo is celebrated in regions like Barolo and Barbaresco in Italy, where these attributes are integral to the style and quality of the wines produced. These typical floral and fruit characteristics combined with the structure make the descriptor provided in the correct answer fitting for a Nebbiolo wine.