Fact 1: Flatworms belong to the phylum Platyhelminthes. Fact 2: Most of the flatworms are parasitic, although the Turbellaria are free-living in fresh water. Given the two facts above, answer the question "Phylum Platyhelminthes are mostly what?" with the following options: - animals - engorged - fungi - infected - parasitic - insects - huge - free living
parasitic