What two key wines from the Levante produce red only, and what grape variety do they use?

The wines from Jumilla and Yecla, both located in the Levante region of Spain, are known for their production of red wines exclusively made from the Monastrell grape variety. Monastrell, also known as Mourvèdre in other parts of the world, thrives in the warm and arid climate typical of this region, allowing it to fully ripen and develop its signature characteristics of dark fruit, spice, and earthy notes.

Both Jumilla and Yecla are recognized for their robust and intense red wines, which often showcase the potential of Monastrell in terms of depth and complexity. The terroir of these areas contributes to the unique style of the wines produced, with a focus on full-bodied reds that often benefit from oak aging to enhance their flavor profiles.

Other choices mention regions and grape varieties that do not accurately match the requirement for both being red wine only producers or do not focus on Monastrell as the key grape variety. This distinct identification with Monastrell and the regional reputation solidifies the choice as the most accurate representation of the question asked.