5. Why is the relationship between the corals and the algae in the coral reefs considered
mutualistic?
A. The corals benefit in the interaction and not the algae.
B. The corals receive oxygen from algae, the algae get protection from corals.
C. The corals receive oxygen from algae while the algae are harmed.
D. The corals and algae live together without harming each other.
6. Which of the following is the role of crustaceans like crabs in the mangrove ecosystem?
A. They attach themselves to the roots of mangroves
B. They help break down leaf litter through grazing.
C. They serve as food of other animals.
D. They find food in the mud.​