37. How long does it take for a coral reef to form?
a. for a few years
c. over a short period of time
b. for a few months
d. over a long period of time
38. What is the main reason for the diminishing rainforest area in the Philippines?
a. climate change
b. deforestation c. dynamite fishing d. erosion
39. Which is not a function of mangrove roots?
a. filter out salt
c. absorb and store salt from the water
b. build up shorelines d. remove impurities and pollutants from water.
40. Which of these is called the "rainforest of the sea"?
a. beach b. coral reef
c. estuary d. lagoon​