Anoxia, or a lack of oxygen in bodies of water, leads to a. unsafe drinking water b. dead zones c. global warming d. algae blooms

The answer is B. Dead zone

Dead zones refer to the water territories which have little or no maritime life do lack of oxygen in the water

Since fish other maritime lives breath using the oxygen that is contained in the water, they won't be able to live in a water territory that have anoxia