The organism shown is a free-living one that is anchored to the bottom of ponds and streams during the first part of its life cycle.

what is the common name of the group to which this organism belongs?

will mark brianlyest

cnidarians

echinoderms

arthropods

comb jellies

b

Explanation:

Echinoderms are a phylum of marine invertebrates that include starfish, brittle stars, sea cucumbers, sea urchins, sand dollars, and crinoids. They are one of the most diverse groups of marine invertebrates and play important ecological roles from the near-shore environment to the deep seas.