Question

place the steps of eutrophication in the correct order. 1 decomposing bacteria use up the dissolved oxygen in the water. 2 excess nutrients runoff into the water. 3 hypoxic or \dead\ zones are created due to a lack of dissolved oxygen. 4 phytoplankton and algae die and start to decompose. 5 algae and phytoplankton bloom due to excess nutrients.

Explanation:

Eutrophication starts with nutrient runoff. Excess nutrients cause algae and phytoplankton to bloom. When they die, they decompose. Decomposing bacteria use up oxygen. Lack of oxygen creates hypoxic zones.

Answer:

1. Excess nutrients runoff into the water.
2. Algae and phytoplankton bloom due to excess nutrients.
3. Phytoplankton and algae die and start to decompose.
4. Decomposing bacteria use up the dissolved oxygen in the water.
5. Hypoxic or "dead" zones are created due to a lack of dissolved oxygen.