Cocoons are protective coverings created by certain insects, such as silkworms and moths, during their development stage. These structures are made from silk or other materials and serve as a safe environment for the insect to undergo metamorphosis, transforming from a larva into an adult. Inside the cocoon, the insect undergoes significant changes, a process known as pupal development. This stage can last from a few days to several months, depending on the species and environmental conditions. Once fully developed, the adult insect emerges from the cocoon, ready to continue its life cycle.