I need answers fast please!

On my paper it says: List major animal milestones the developed in each of the following phyla:

A) Porifera-

B) Cnidaria-

C) Platyhelominthes-

D) Chordata-

If you cannot help that is okay.
Thanks!

p-multicallular

c-2 tisssue layers
p-psuedocoelem i thiink