Prokaryotes are found in

Eukarya only.
Bacteria only.
Archaea and Bacteria.
Archaea and Eukarya.

Archaea and Bacteria is the correct answer. I did this test and got it right.

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.