Weather conditions such as wind, the path of the flow
The answer is Echinoderms.
According to the Embryological studies, the most ancient chordates were closely related to the ancestors of the echinoderms. Echinoderms are members of the group Phylum Echinodermata of marine animals. Some known echinoderms are starfish, and sea cucumbers.
The answer is cnidaria
hope this helps :)
Polymers are many moments strung together. They are linked together by dehydration reactions. (Remove water)
Organism-population-community-ecosystem-biome in that order