What would be the most beneficial towards maintaining equilibrium in an ecosystem over a long period of time? a)organisms imported by humans from other environments
b)a sudden change in climate
c) a diversity of organisms
d)predators eliminated from the food chains

c) a diversity of organisms

Explanation:

Biodiversity refers to the number of different species of animals,plants and microorganisms.Biodiversity increases ecological stability in changing environments.Biodiversity reduces competition ,provide more food resources,increases ecosystem productivity etc.

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.