Which of the following phyla has been found to be the most successful in the animal kingdom?
Explanation
Arthropods are considered the most biologically successful in the animal kingdom because they are the most diverse and live in a greater range of habitats than do the members of any other animal phylum. The following adaptations contribute to their success: segmented body, chitinous exoskeleton, paired - jointed appendages, cephalisation (development of head) and presence of nervous system, and open circulatory system.