Explanation:
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A, neither created nor removed
The correct matches are as follows:
11. Strong currents, stout fire corals, surgeon and parrot fish
C. Submarine Terrace
12. Horizontal corals, gorgonian corals and sea fans
E. Reef Slope
13.Highest point of Reef, stoutly branching coral
B. Algal Ridge/Reef Crest
14. Beds of sea grasses, sharks and rays
A. Reef flat
15. Flat outter reef, encrusting coralline algae, gardens of coral
<span>D. Terrace</span>