Answer:
They typically have a tough, spiny surface, which inspired their name (in Greek, echinos means “spiny” and derma means “skin”). They also have the unusual ability to regrow lost body parts, and sea stars and brittle stars can regrow arms if broken off or eaten
Explanation:
Cells, tissue, organs, organ systems, and organisms.
Answer:
idk but good luck i hope you get it right
Explanation:
Well there are 3 newton laws
