Question to you: What is secreted by organisms like frogspawn to become a reef?\nOptions:\n- (A) exocrine glands\n- (B) food and shelter\n- (C) exoskeleton\n- (D) bones\n- (E) Energy\n- (F) Chemical energy\n- (G) plasma\n- (H) Energy..
Let's reason step-by-step:
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Many corals secrete an exoskeleton that builds up to become a coral reef. Good examples are Bubble coral, Elegance coral, Frogspawn and other Euphyllia corals. Organisms like frogspawns secrete an exoskeleton that builds up to become a reef. Final answer: (C).
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