There appears to be some relationship between population density and the presence of large dead zones. Can you explain why dead zones seem to be more prominent in areas of high population density
Nitrogen and phosphorus runoff from sewage and agricultural activities in high population centers leads to the formation of dead zones.
People in these high population areas have over fished their coastal waters, leading
dead zones
The abundance of cruise ships in these high population centers results in the production of large amounts of pollution, leading to the formation of dead zones.
This is a random correlation and not a result of population centers causing the dead zones

Dead zones can be defined as an area of significant pollution.

Explanation:

Dead zones are associated with waters with low-oxygen content and the organisms suffer from hypoxic conditions. These areas include the waters of oceans, lakes and other types of water bodies.

The dead zones are created due to human activities. The high density population of human kind require space to survive. They use and contaminate the nearby source of water body. The agriculture pollutants contains fertilizers and pesticides which contains nitrogen and phosphorus that runoff into the water body. Also the sewage discharge also increases the nitrogen content in nearby source. Thus makes the water body oxygen deficient.

The large population of human kind may depend on fishery as source of food thus they may create a dead zone in nearby water body by overfishing and depleting the population to a level of zero.

The cruise may introduce oil contaminants in the water body which can reduce the oxygen availability of the water hence, kill the organism and create a dead zone.

did you fail the test? xd

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.