What is the main characteristic of red wines?

Red wines are primarily characterized by their rich, bold flavors and tannins, which are derived from the skins of dark grapes used in their production. The correct choice highlights that red wines encompass a range of styles, including both dry and sweet variations. This means that while many red wines are indeed dry, not all fall into this category; some can have varying levels of sweetness due to residual sugar remaining after fermentation.

Moreover, red wines are typically served at slightly cooler than room temperature, contrary to the choice that indicates they should be served chilled, which is more applicable to certain styles of white or sparkling wines. Additionally, while it is true that many red wines can improve with age, suggesting that they all improve with age and can be sweet conflates two different aspects: aging potential and sweetness. Lastly, the idea that red wines must be consumed within two years is inaccurate, as many high-quality red wines benefit from prolonged maturation, making this statement misleading.