Flatworms belong to the phylum Platyhelminthes, and most of the flatworms are parasitic, although the Turbellaria are free-living in fresh water. Given these facts, phylum Platyhelminthes are mostly what among the following options:
- animals
 - engorged
 - fungi
 - infected
 - parasitic
 - insects
 - huge
 - free living


 

     parasitic    