28. They Are Soft-Bodied Animals With Shells Inside Or Outside Their Bodies Called Exoskeleton., 29. Marine Animals With Spiny Endoskeleton. , 30. They Are

28. They are soft-bodied animals with shells inside or outside their bodies called exoskeleton.

29. Marine animals with spiny endoskeleton.
30. They are pore-bearing animals which attact themselves to rocks or sea floor.

 

Answer:

28,Invertivrates

29,Echinoderms

30,Porifera