Which of these is a common style of distilled beverage that may undergo aging?

Tequila is recognized as a common style of distilled beverage that is often subjected to aging. Aging enhances its flavor profile, allowing it to develop richer complexity and depth, making varieties like Añejo and Extra Añejo prized for their smoother, more nuanced tastes that come from the interaction with wooden barrels.

While vodka is typically characterized by its neutral flavor and is not generally aged, and gin, while it may undergo a brief aging period in some styles to add complexity, does not commonly have the same aging process or varieties as tequila. Therefore, tequila stands out as the clear example of a distilled beverage that is typically aged to improve its characteristics.