Which phylum includes members that have a body divided into three regions called the visceral mass, head-foot, and mantle?

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The phylum Mollusca includes members that have a body divided into three regions called the visceral mass (where internal organs are contained), head-foot (where the head and feet are located), and mantle (a fold of tissue that surrounds and protects the visceral mass).

Which Phylum Includes Members That Have a Body Divided into Three