What two factors can influence the level of tannin in a wine?

The correct choice highlights the role of natural tannin levels in grapes and the impact of winemaking techniques. Tannins, which are compounds found primarily in the skins, seeds, and stems of grapes, can vary depending on the grape variety and the conditions of the vineyard. However, the way in which winemakers process the grapes also plays a critical role in determining the final tannin content of the wine.

Natural tannin levels depend on factors such as the grape variety itself; some grape varieties are naturally high in tannins, while others are low. Additionally, winemaking techniques, including the length of skin contact during fermentation, can enhance or diminish tannin extraction. For example, extended maceration or fermentation with grape skins leads to higher tannin extraction, contributing to a more tannic wine.

By understanding both the natural aspects of the grapes and the choices made during winemaking, one can appreciate how these factors come together to influence the overall tannin levels in the finished wine.