Which feature is a common complication found in watches?

A common complication found in watches refers to any feature beyond the basic timekeeping function. Each of the features listed contributes to a watch’s complexity and functionality, making them popular among watch enthusiasts.

The small seconds indicator offers an additional way to track time, specifically the seconds, which can be particularly useful for precision. The date display is another popular complication, allowing the wearer to easily keep track of the current date. Additionally, the power reserve indicator provides valuable information about how much energy remains in the watch's movement, which is especially important for mechanical watches that require winding.

Given that all three features enhance the watch's functionality and provide additional information to the wearer, it is accurate to categorize them collectively as common complications found in watches. Thus, the choice that includes all of these features reflects their shared role in expanding the capabilities of timepieces beyond mere hour and minute indications.