Maybe because they like coacervates.
Echinoderm is the name given to a member of the phylum Echinodermata. They have radial symmetry and this includes sea urchins, sand dollars, sea stars and sea cucumbers. It is suggested that they are related to the chordates which is the answer.
You can have plans on where to go if found in the midst of an Earthquake. Talk to local teachers, adults and family members to know what to do when caught in an Earthquake.
CHON is a mnemonic acronym for the four most common elements in living organisms: carbon, hydrogen, oxygen, and nitrogen.
Hope this helps
