Discuss with the class why their choice is or is not correct. Discuss with the class any remaining questions they may have about the examples. The fungi provide minerals to the plant, and the plant provides food to the fungi. Egrets are beautiful white birds that roost on the back of cows. The egret eats flies that bother the cow.
Tapeworms inhabit the intestines of dogs.
They feed on food the dog is digesting. While they do not usually kill the dog, they can weaken the dog, making it susceptible to other illnesses. The stinging tentacles of the sea anemone do not affect the clounfish. It is, thus, protected from predators and feeds on the sea anemone's leftovers, as it swims among its tentacles. The anemone is not harmed by the fish.