Drying corn to make feed corn for cattle a. has no effect on pesticide residues. b. reduces pesticide residues. c. increase the amount of fat in beef. d. concentrates pesticide residues, which are further concentrated in beef.

Option D

Explanation:

Bio-magnification is a process in which the amount of harmful chemicals starts accumulating at each level of a food chain or energy pyramid.  

Here, the amount of pesticide left on the corn leaf remains at its surface and when it is dried and fed to the cattle it starts accumulating there and is present in a higher percentage as compared to its source i.e leaves

Therefore, when these cattle are cut and an individual being eat that beef then the concentration of harmful pesticide chemical increases further.  

Hence, option D is correct

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