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# Increase in concentration of pollutant by the process of food chains is called

$\begin{array}{1 1}(a)\;Eutrophication\\(b)\;Bioamplification\\(c)\;Defluridation\\(d)\;Biological\;oxidation\end{array}$

Increase in concentration of pollutant by the process of food chains is called Bioamplification
Hence (b) is the correct answer.