Some Dinoflagellates Live Endosymbiotically with Coral

Multiple Choice

Some dinoflagellates live endosymbiotically with coral.When dinoflagellates die, this contributes to coral bleaching.Their death has this result because dinoflagellates

A) protect corals against parasites.
B) create a current with their flagella that brings microorganisms to feeding coral.
C) contribute to coral nutrition through photosynthesis.
D) create phosphorescence that attracts prey microorganisms to corals.
E) release toxins that immobilize microorganisms on which corals feed.