What is an exoskeleton ? Why do u think it would be important for an invertelorate to have on exoskelelton?

A exoskeleton is a rigid external covering for the body in some invertebrate animals, especially arthropods, providing both support and protection. Insects, crustaceans, and many other invertebrates have a hard outer case called an exoskeleton. This protects them against blows and predators, and keeps them from drying out

U SHOULD GET RID OF RATS...but some are cute sometimes but some are creepy so GET RID OF THE CREEPY RATS