Question

animals with hollow cavity and mouth surrounded by tantckles belong to phylum​

Answer 1

Answer:

Cnidarians

Explanation:

Answer 2

Answer:

Sponges do not have a digestive system. Hence they don't have a mouth and anus. The functions of digestive system are performed by canal system.

Coelenterates have a mouth and anus as they have a gastrovascular cavity.

Phylum Platyhelminthes has incomplete digestive tract but mouth and anus are present.

Phylum Nemathelminthes has a complete and digestive tract with mouth and anus.

So, the correct answer is 'Sponges'.