In the deep waters of the ocean, coral reefs are found in abundance. Algae live on these coral reefs, providing nutrition and producing pigments that give color to the corals. The corals offer shelter to the algae. So, they share a symbiotic association. Climate change has led to increased temperatures and has caused the corals to throw away the algae living inside them. This action causes the corals to be bleached because of a lack of pigment. This change will lead to coral bleaching. The corals will die of lack of nutrition with time.
Answer:
The answer is A, because 55+15=70, and 70-67=3
Probably erosion...either by wind, run-off water or a river that drains into the ocean near the ports.
Hope this helps!
