(N/A) The classification of the Kingdom Animalia is based on the following fundamental features:
$1$. Levels of organization: Cellular,Tissue,Organ,or Organ system level.
$2$. Symmetry: Radial or Bilateral symmetry.
$3$. Diploblastic or Triploblastic organization (germ layers).
$4$. Presence or absence of a body cavity (coelom): Acoelomates,Pseudocoelomates,or Coelomates.
$5$. Segmentation (metamerism).
$6$. Presence or absence of Notochord.
The classification chart is as follows:
Animalia (multicellular) -> Cellular level: Porifera; Tissue/Organ/Organ system level -> Radial: Coelenterata (Cnidaria),Ctenophora; Bilateral -> Without body cavity (acoelomates): Platyhelminthes; With false coelom (pseudocoelomates): Aschelminthes; With true coelom (coelomates): Annelida,Arthropoda,Mollusca,Echinodermata,Hemichordata,Chordata.