Multiple choice

Eutrophication refers to ________.

  1. increase in concentration of the toxicant at successive trophic levels

  2. natural aging of a lake by biological enrichment of its water

  3. shift in ocean temperatures and atmospheric conditions in the tropical Pacific that disrupts weather around the world

  4. presence of large amounts of nutrients in waters also causes excessive growth of planktonic (free-floating) algae

  5. process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and re-radiated in all directions
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Eutrophication is the natural aging of a lake by biological enrichment of its water.

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