What defines a vino generoso de licor?

A vino generoso de licor is defined as a type of fortified wine that is created by blending a dry base wine with a small amount of sweet wine or concentrated grape must. This specific definition highlights the unique characteristic of these wines, which is the intentional addition of sweetness, typically to balance the natural dryness of the base wine. This process allows for a diverse range of flavor profiles and enhances the richness and complexity of the final product. By using both a dry base and a sweeter addition, the resulting wine achieves a balance that appeals to a variety of palates.

In contrast, the other options focus on different aspects of wine production or specific types of wine that do not fully capture the essence of a vino generoso de licor. For example, wines aged biologically without blending emphasize the aging process rather than the blending of sweet and dry elements. Option C is too specific, as it relates solely to Pedro Ximénez grapes, while vino generoso de licor can be made from various grape varieties. Lastly, the mention of high residual sugar content with no blending does not align with the key characteristic of a vino generoso de licor, which specifically involves blending to achieve the desired sweetness.