Which grape is most commonly found in red wines from Bordeaux's Left Bank?

Cabernet Sauvignon is the grape most commonly found in red wines from Bordeaux’s Left Bank due to its suitability for the region's climate and terroir. This grape variety thrives in the gravelly soils that are prevalent in the Left Bank, particularly around the Médoc and Graves areas. Cabernet Sauvignon is known for its deep color, full body, and robust tannins, which contribute to the structure and aging potential of the wines produced there.

The Left Bank is characterized by a dominance of Cabernet Sauvignon in blends, often paired with Merlot, Cabernet Franc, and sometimes Petite Verdot. The wines from this region, such as those from prestigious estates like Château Lafite Rothschild and Château Margaux, typically showcase the richness and complexity that Cabernet Sauvignon can deliver, highlighting its dark fruit flavors, herbaceous notes, and often a hint of oak from aging in barrels.

Other grape varieties listed are predominantly found in different regions or have lesser prominence in Bordeaux. Sangiovese is primarily associated with Italian wines, particularly from Tuscany. Pinot Noir is more characteristic of Burgundy in France and is not a significant player in Bordeaux. Grenache is typically found in regions like the Southern Rhône and Spain but does not dominate the Left Bank's red wine profile.