# Eutrophication occurs due to :-

$\begin{array}{1 1}(a)\;\text{Organic wastes}\\(b)\;\text{Detergents}\\(c)\;\text{DDT}\\(d)\;\text{Sewage water}\end{array}$

DDT causes eutrophication. Hence C is the answer.
Hence (c) is the correct answer.
edited Nov 27, 2017 by meena.p