Question

Out of these which one describes a sea cucumber and describes a urchin

Answer 1

Clumps together, ability to keep water in its shell and release it as needed to stay moist
Soft bodies that absorb wave energy, can fold inward to hold in moisture
Use tube feet to suck food off floor of tidal pool
Glue themselves to rocks, filter food during high tide, trap door to store moisture in shell
Holdfast to secure to rocks, photosynthesize to make food
Spines that absorb energy, hides in rocks and crevices to avoid pounding waves
Walking fish, pants to force water over gills
Tube feet to move to shady area
Occupy empty shells to hide, hard outer protection