You spray your lawn with a pesticide.The concentration of the pesticide in the tissues of the grass on your lawn is 10- 6 parts per million (ppm) .Grasshoppers eat the grass and are in turn eaten by rats,which are then eaten by owls.At each successive trophic level,the concentration of pesticides increases.The term for this process is
A) biological extirpation.
B) trophic concentration.
C) biological magnification.
D) bioconcentration.
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