Fill in the Blanks (Reading & Writing)

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Bioluminescent organisms produce their own light through a chemical reaction, a trait that has evolved —independentlyreluctantlypermanently across many unrelated species. For some deep-sea creatures, this glow serves to lure prey, while for others it acts as a defensive —mechanismcelebrationshortage, startling a predator long enough to allow an escape. Such varied uses suggest the ability is highly —adaptedopposedexported to each animal's environment.