Locomotory organs in $Taenia$ are called

Which phylum consists of acoelomate animals that are dorso-ventrally flattened?

Flame cells are the characteristic feature of which phylum?

Which of the following is an acoelomate animal phylum?

Endoparasites are found inside the host body. Mention the special structure possessed by these and which enables them to survive in those conditions.

What is correct about $Taenia$?