Which grape variety is primarily used in the production of Champagne?

The primary grape varieties used in the production of Champagne are Chardonnay, Pinot Noir, and Pinot Meunier. While Chardonnay is a key component, the emphasis is on its fundamental role in contributing to the structure, acidity, and aging potential of the wine.

Chardonnay is known for its crispness and elegance, which is why it's considered a primary grape in the production of high-quality sparkling wines like Champagne. It often imparts flavors of green apple, citrus, and sometimes floral notes, forming the backbone of the blend. Especially in the context of producing Blanc de Blancs Champagne, which is made exclusively from Chardonnay, its importance becomes even more pronounced.

The other grape varieties mentioned, while significant, do not share the same primary designation as Chardonnay in the context of Champagne production. Pinot Noir, for example, is also essential as it provides body and structure, contributing to the complexity of the wine. However, the question specifically asks for the primary grape variety, which identifies Chardonnay as the correct answer due to its unique characteristics and its prevalence in key styles of Champagne.