Dead zones are areas in bodies of water, typically near the mouths of major rivers, where the oxygen levels are so low that marine life cannot survive. This condition is often caused by nutrient pollution from runoff, leading to excessive algae growth that depletes oxygen in the water.

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A Dead Zone Is

Question 74

Multiple Choice

A dead zone is:

A) an area near the mouth of a major river system in which there is little to no life.
B) an area that a farmer has allowed to be unproductive in order to raise crop prices.
C) an area in which there is no Internet access.
D) an area in which a species has been permanently lost.

Correct Answer: