A flatworm grows insides a freshwater snail and gives the snail a harmful

infection. What relationship does this describe?

predation

parasitism

mutualism

commensalism

Parasitism

ExplanatioThe flatworm seems to be the only one benefitting from the relationship because it is using the snail as a host and provides it a place to grow but the snail is being harmed by the worm while doing so. Therefore the relationship is parasitic.