The increase in concentration of a non-degradable pesticide such as DDT at successive trophic levels of a food chain is called

Aeutrophication
Bphotochemical smog
Cacid rain
Dbiomagnification

Answer: D

A persistent fat-soluble pesticide is not excreted, so each organism that eats contaminated food retains it. Its concentration therefore rises along the food chain, which is biomagnification.

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