In which of the following is the concentratio | vedclass

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(B) The phenomenon of $DDT$ concentration increasing at each successive trophic level is known as $Biomagnification$.In an aquatic food chain,$DDT$ en

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Sea birds / Gulls

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(B) The phenomenon of $DDT$ concentration increasing at each successive trophic level is known as $Biomagnification$.In an aquatic food chain,$DDT$ enters the water and is absorbed by $Phytoplankton$ (producers).As these are consumed by higher trophic levels,the concentration of $DDT$ increases because it is fat-soluble and cannot be metabolized or excreted.Therefore,the highest concentration of $DDT$ is found in the top-level consumers,which in this list are the $Sea$ $birds$ $(Gulls)$.

Column - $I$	Column - $II$
$(1)$ Nitrous oxide	$(a)$ Secondary pollutant from car exhaust.
$(2)$ Chlorofluorocarbons	$(b)$ Combustion of fossil fuels,wood etc.
$(3)$ Methane	$(c)$ Denitrification
$(4)$ Ozone	$(d)$ Refrigerators,aerosols,sprays
$(5)$ Carbon dioxide	$(e)$ Cattle,rice fields,toilets

In which of the following is the concentration of $DDT$ highest?

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