What effect does eutrophication have on aquatic ecosystems? a.)it prevents sunlight from reaching aquatic life below the water’s surface. b.)it negatively impacts aquatic vegetation but is beneficial for all aquatic animals. c.)it decreases carbon dioxide concentration, which is harmful for aquatic animals. d.)it lowers the concentrations of nitrogen and phosphorous available to marine animals.

Option A

Explanation: The eutrophication can be defined as the increased concentration of the minerals and nutrients in the water body.

The nutrients and minerals like nitrogen and phosphorous gets in through the agricultural run off, this leads to the growth of the algae in the water and this consumes the oxygen present in the water and makes it unavailable for the aquatic organism.

The sunlight does not reaches the aquatic life because the algal bloom covers the surface of water.