Task: Text Categorization
Input (English): Members of this phylum a triploblastic protostomes that generally exhibit bilateral symmetry. Their larval development suggests close links to Annelids, but veliger stage of their larval development is unique. A class of this phylum is represented by the chitons, consisting of the highly muscular foot, the shell, and the mantle. The mantle cavity contains leaflike flaps extending from the foot called gills, and all members excepting one contain an extensible raspy tongue called a radula. Its largest and most diverse class is the gastropoda, which can retreat within its shell for protection. Others include the cepholopods and bivalves. For ten points, name this animal phylum who counts among its members oysters, clams, and octopuses.
Output (English): Science