Acommunity is all the populations of living organisms in a designated area.

what is an ecosystem?

a. community plus artificial components in an area

b. community plus nonliving components in an area

c. community plus living components in an area
i will give you brainliest for the right answer and the best explantion

Correct answer is B

Explanation: I believe an Ecosystem is community of living organisms where non living systems of their environmental. Biotic and Abiotic components are together nutrient cycles and energy flows. There are types of Ecosystems such as Tundra, Desert, Cropland, and Rainforest..etc

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."