Which two wine regions of the Upper Ebro exclusively produce red wines?

The choice of Carinena and Calatayud as the correct answer is justified by the fact that both of these wine regions in the Upper Ebro are predominantly known for their red wine production. Carinena, part of the Aragón region, has a rich history of producing quality red wines primarily made from Garnacha and Tempranillo grapes. Similarly, Calatayud, also located within Aragón, is renowned for its expressive red wines predominantly produced from Garnacha, as well as other varietals like Syrah and Tempranillo.

These regions focus on grape varieties that thrive in their warm climate and unique terroir, resulting in vibrant and full-bodied red wines. Understanding the focus of these regions on red wine production highlights their significance in Spain’s overall wine landscape and shows how certain areas specialize in specific wine styles.