What is biological magnification ?

What is biological magnification ? Will the levels of this magnification be different at different levels of the ecosystem ?

The accumulation of harmful chemicals in the body of living organisms at different trophic levels in a food chain is called biological magnification. Yes, the concentration of these harmful chemicals will be different at different trophic levels. It will be maximum at the last trophic levels which is mostly of the top carnivores (quaternary consumers).

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