Why housefly and locust are in arthropoda?

Houseflies and locusts are classified in the phylum Arthropoda due to their shared characteristics, such as having an exoskeleton made of chitin, segmented bodies, and jointed appendages. Both belong to the class Insecta, which is characterized by a three-part body structure (head, thorax, abdomen), compound eyes, and typically two pairs of wings. Their developmental stages often include metamorphosis, which is another trait common among arthropods. These features highlight their evolutionary relationship within the diverse group of arthropods.