Answer:
introduces substances into an environment
Explanation:
eutrophication is just a bunch of algae in a pond or source of water. pollution is bad materials in the air. smoke and algae are substances in an environment.
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I believe the answer is B.
Answer:
High density also affected the weight of snails and survival to a greater degree than ... that snail populations are regulated by nonlinear density-dependent mechanisms. ... individuals in the environment is a critical ecological factor that can affect the ... is to treat water bodies with a molluscicide to reduce the number of snail
Explanation:
