What characteristic qualifies as a class characteristic of a black 4th Generation iPod Classic?

A class characteristic refers to a feature that is shared by a group of items rather than unique to a particular item. In this case, the fact that the iPod is black qualifies as a class characteristic because it denotes a color shared by many 4th Generation iPod Classics, not a specific feature that identifies an individual device.

This characteristic helps group items into categories based on common features, which can be important in investigations where commonality among multiple objects can be analyzed. In contrast, having a specific number of songs, a unique storage capacity, or a specific physical condition like a cracked screen cover describes features that may be unique to a particular device versus shared across multiple devices of the same model. These details might be considered individual characteristics rather than class characteristics, making the color the only valid choice for class characteristics in this context.