What is a pathogen? Give one specific example.

An organism capable of causing disease in its host.

coli, and viruses such as Cryptographic

Explanation:

it restores trees to areas where they once grew.

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.