Four of the following are major human activities that disrupt and degrade freshwater systems. Which one is the exception?
A. reintroducing salmon stock to natal streams
B. fragmenting habitats through dams and canals
C. disconnecting rivers from floodplains through flood control levees and dikes
D. adding excess nutrients and pollution through cities and farms
E. draining inland wetlands to grow crops
Answer: A
Environmental & Atmospheric Sciences
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