Multiple choice

Biological magnification occurs in environment as a result of water pollution. Which of the following factors may be involved in biological magnification?

  1. Chlorinated hydrocarbons

  2. Oil spills

  3. Sewage water

  4. Chlorofluorocarbons

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A Correct answer
Explanation

Chlorinated hydrocarbons are present in pesticides and are involved in biological magnification. These chemicals may be selectively accumulated by organisms to much larger concentrations than that can cause toxicity.