hylum with the correct group of organisms. Echinodermata square Annelida square Mollusca square Arthropoda square Complex worms : Barnacles, crabs, and shrimp : Clams, snails, squid, and octopus :Sea stars, sand dollars sea urch

To classify the given organisms into their respective phyla, we need to match them with the correct group of organisms.<br /><br />Step 1: Identify the organisms and their corresponding groups.<br />- Sea stars, sand dollars, and sea urchins belong to the phylum Echinodermata.<br />- Barnacles, crabs, and shrimp belong to the phylum Arthropoda.<br />- Clams, snails, squid, and octopus belong to the phylum Mollusca.<br />- Complex worms belong to the phylum Annelida.<br /><br />Step 2: Match the organisms with their corresponding phyla.<br />- Echinodermata: Sea stars, sand dollars, and sea urchins<br />- Annelida: Complex worms<br />- Mollusca: Clams, snails, squid, and octopus<br />- Arthropoda: Barnacles, crabs, and shrimp<br /><br />Answer: <br />Echinodermata: Sea stars, sand dollars, and sea urchins<br />Annelida: Complex worms<br />Mollusca: Clams, snails, squid, and octopus<br />Arthropoda: Barnacles, crabs, and shrimp