Question

Which is a cause of eutrophication?

Bacteria use up the oxygen in the water, killing off fish and other organisms.

Wastewater enters lakes and ponds, increasing nitrogen and phosphorus.

Algae prevent sunlight from reaching plants and animals below the surface.

Ocean currents stir up nutrients from the ocean’s cold bottom layers.

Answer 1

B.
It is caused by excessive plants and algae growth due to the increased availability of one or more limiting growth factors needed for photosynthesis

Answer 2

Answer: wastewater enters lakes and ponds,increasing nitrogen and phosphorus.

Step-by-step explanation: