Which phylum is known for its members like insects, crabs, and shrimp?

The phylum Arthropoda is distinguished by its diverse and abundant members, including insects, crabs, and shrimp. This phylum is characterized by features such as an exoskeleton made of chitin, jointed appendages, and segmented bodies, which contribute to the adaptability and success of arthropods in various environments. The vast diversity within this phylum includes not only terrestrial insects but also aquatic crustaceans like crabs and shrimp, showcasing the wide range of habitats they occupy.

Other phyla mentioned do not encompass these specific groups: Chordata primarily includes vertebrates and some invertebrates with a notochord, Mollusca consists of soft-bodied animals such as snails and octopuses, and Cnidaria includes creatures like jellyfish and corals. These characteristics help to clearly identify Arthropoda as the phylum that encompasses insects, crabs, and shrimp.