Arrange the following in increasing order of DDT concentration among them as a result of bioaccumulation. Choose the correct answer from the options given below.

1.Fish

2.Water body

3.Fish-eating birds

4.Zooplankton

A1, 2, 3, 4

B2, 4, 1, 3 ✓ Correct

C3, 4, 1, 2

D2, 1, 3, 4

Correct answer: (B) 2, 4, 1, 3

Explanation

DDT concentration rises up the food chain, so the water body holds the least and top predators the most.

The water body itself carries only the faintest trace of the pollutant.

Zooplankton absorb DDT from the water and hold a little more than it.

Fish that eat the zooplankton concentrate the toxin to a higher level.

Fish-eating birds at the top store the greatest DDT load of all.

This upward increase along trophic levels is called biomagnification.

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