Soldier termites can be recognized by what distinct feature?

Soldier termites are primarily identified by their well-developed mandibles, which are large and powerful jaws. These mandibles serve a crucial function in the colony; they are used for defense and to protect the queen and other members of the colony against predators, such as ants and other threats. The formidable nature of their mandibles allows soldier termites to effectively combat intruders and contribute to the overall safety of their community.

The other options do not accurately characterize soldier termites. For example, soldier termites do not possess long legs or bright coloration; their body structure does not include notable wing characteristics as they do not fly. Their primary adaptation is their strong mandibles, making this feature the most distinctive and critical for their role within the colony.