An organism that uses hydrogen sulfide as a source of energy is categorized as which of the following?
question 41 options:

photoautotroph

chemoautotroph

heteroautotroph

thermoautotroph

chemoatotroph

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Explanation:

i guess

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.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.