The important topics included in NCERT Solutions for Class 11 Biology Chapter 4 Animal Kingdom  are:

• Basis of Classification
  
• Levels of Organisation  
• Symmetry   
• Phylum – Porifera  
• Phylum – Coelenterata (Cnidaria)  
• Phylum – Ctenophora  
• Phylum – Platyhelminthes  
• Phylum – Aschelminthes  
• Phylum – Annelida  
• Phylum – Arthropoda  
• Phylum – Mollusca  
• Phylum – Echinodermata  
• Phylum – Hemichordata  
• Phylum – Chordata