Factors that make insect the most successiful animal?

An arthropod is an invertebrate animal having an exoskeleton a segmented body and joined appendages. Arthropod are phylum of Arthropoda(arthods-joind;podas-foot) Arthropods are characterized by their jointed limbs and cuticles, which are mainly made of α-chitin It is so versatile that they have been compared to Swiss Army knives.