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How can the dissolved oxygen rebound in the recovery zone? a the excess nutrients have been diluted that far away from the dead zone. b the presence of nitrogen and phosphorus here has less effect. c the organisms here need less dissolved oxygen to survive than those in the clean zone. d the biochemical oxygen demand goes up in the recovery zone.

Sagot :

Answer: Excess nitrogen and phosphorus can cause algae blooms. The overgrowth of algae consumes oxygen and blocks sunlight from underwater plants.

Explanation:

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