What characteristic is unique to echinoderms?

What do animals wth echolocation have in common other than echolocation

Restless tectonic plates move (shift) between one and fifteen centimeters per year month day minute

Study the picture of the ocean. which is the best example of an organism’s niche shown in the picture? a. the environment contains several of the same species of coral. b. the shallow area of the ocean meets the needs of the coral and the fish. c. the ocean has fish and coral that live in the same area. d. the coral take in food from the water and provide shelter for the fish.