7 results from the interconnected food chains. au b. consumer producer food web biotic component C. 8. a. Why is the relationship between the corals and the algae in the coral reefs considered mutualistic? The corals benefit in the interaction and not the algae. b. The corals receive oxygen from algae, the algae get protection from corals. The corals receive oxygen from algae while the algae are harmed. d. The corals and algae live together without harming each other C. 9. What kind of interaction is shown when animals like crabs and mollusks help break down plant litter in a mangrove ecosystem through grazing? competition b. commensalism C. parasitism mutualism​