What characteristic is true for arthropods?

The characteristic that is true for arthropods is that they possess jointed legs and an exoskeleton. This defining feature distinguishes arthropods from other animal groups. Arthropods, which include insects, arachnids, crustaceans, and myriapods, have an external skeleton made of chitin, providing support and protection for their bodies. The jointed legs allow for a wide range of movement and adaptability in various environments, which is crucial for their survival and evolutionary success.

In contrast, the other options highlight traits that do not apply to arthropods. Being warm-blooded pertains to mammals and birds, which have mechanisms for regulating their body temperature. Vertebrates, having a backbone, are a separate classification that does not include arthropods, which are invertebrates. Soft-bodied refers to organisms like mollusks and annelids, which lack the hard exoskeleton characteristic of arthropods.