Bio-20

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Coral reefs are rock like ridges built naturally by tiny marine animals called corals. They have taken hundreds of years to form. Why are scientists and engineers building artificial reefs off the coast of France, Japan and the United States?
A.To trap pollutants
B.To decrease the fish
C.To increase current activity
D.To increase the variety of sea creatures.

  • Bio-20 -

    "An artificial reef is a man-made, underwater structure, typically built for the purpose of promoting marine life in areas of generally featureless bottom." (Wikipedia)

    C or D...

  • Bio-20 -

    Thank -you

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