Which stage of gradual metamorphosis is characterized by the insect being fully formed and ready to reproduce?

The stage of gradual metamorphosis characterized by the insect being fully formed and ready to reproduce is the adult stage. At this point in the development of the insect, it has completed all necessary physical transformations and has attained the set of characteristics that define its species. The adult stage is crucial as it is the time when insects engage in reproduction, ensuring the continuation of their species.

Insects at this stage have developed reproductive organs and exhibit behaviors associated with mating and laying eggs. They also often have fully developed wings and can exhibit various behaviors for survival, feeding, and attracting mates. This stage sets the foundation for the life cycle to start anew with the next generation, beginning again with the egg stage. The other stages, such as the pupa, egg, and larva, are essential for development but do not yet have the reproductive capabilities that define the adult stage.