A) Phytoplanktons
B) Sea gull
C) Crab
D) Eel fish
Correct Answer: B
Solution :
The increases in the concentration of a nonbiodegradable pollutant through successive trophic level is called biological magnification. Sea gull is the top consumers in the food chain therefore highest concentration of DDT will be deposited in it. Phytoplanktons are producers in the water bodies therefore they have least concentration of DDT. Crab and Eel fish have DDT concentration in between the phytoplanktons and sea gull.
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