Embryological evidence suggests that echinoderms are closely related to (chordates, deuterostomes), animals that have a notochord.

Chordates is Right Answer

Explanation:

Chordates is right Answer.Echinoderms speak to the phylum most closely  identified with chordates.   Echinoderms are showing of sea-shore. Echinoderms comprise of five classes sea-lily, sea-cucumber, starfish, sea-urchin and brittle-star From some perspective, it has been viewed as that echinoderms are developmental close identified with vertebrates.  They incorporate sea stars, sand dollars, and plume stars.Chordates incorporate vertebrates and invertebrates that have a notochord. Chordates additionally have a post-butt-centric tail, dorsal empty nerve rope, and pharyngeal slits.

What is the question? if you were looking to design a method of separating something, you can separate this compound by putting both in water and allowing the water to dissolve the sugar. then pour it into another beaker and evaporate it then boom! salt and sugar : ) 

It's either -limiting factors or -scarce resources but i'd go with my first answer since the food and water are abundant they really aren't scarce