The portuguese man o' war, physalia physalis, is a siphonophore, related to jellyfish. a small fish called the man-of-war fish is partially immune to the stinging cells of the siphonophore and can live among the tentacles. the man-of-war fish benefits from this shelter and does not affect the portuguese man o'war. what type of relationship is this, and why?

a. commensalism because one species benefits.
b. mutualism because both species benefit.
c. parasitism because one species is harmed.
d. predation because on species dies.