Which nervous system contains the brain?

central nervous system

peripheral nervous system

somatic nervous system

autonomic nervous system

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.

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