7. Which is not a type of coral reef?
A. atoll B.barrier reef C. fringing reef
D. lagoon
8.How can mangrove plants tolerate saltwater?
A. They filter salt from the water using their roots.
B. Their bark is made of salt-proof material
C. They use salt and water to make food
D. They do not absorb saltwater.
9. Which is not a function of mangrove roots?
A. filter out salt
B. build up shorelines
C. absorb and store salt from the water
D. remove impurities and pollutants from water
10. Which of these is called the "rainforest of the sea "?
A beach B. coral reef C. estuary D. lagoon​