Final answer:
The noble grape varieties in Alsace are Riesling, Gewürztraminer, and Pinot Gris.
Step-by-step explanation:
In Alsace, the noble grape varieties are Riesling, Gewürztraminer, and Pinot Gris. These grape varieties are well-suited to the region's cool climate and unique terroir. Riesling produces aromatic and elegant white wines, Gewürztraminer offers intense and spicy flavors, and Pinot Gris delivers rich and complex wines.