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(A) $DDT$ is a non-biodegradable chemical substance that cannot be broken down by biological processes.It accumulates at each successive trophic level

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Man is at the highest trophic level.

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(A) $DDT$ is a non-biodegradable chemical substance that cannot be broken down by biological processes.It accumulates at each successive trophic level in a food chain,a phenomenon known as biological magnification or biomagnification.Since man occupies the highest trophic level in this food chain,the concentration of $DDT$ is found to be the maximum in man due to the cumulative effect of its intake from lower trophic levels.

In a certain study conducted on the occurrence of $DDT$ along food chains in an ecosystem,the concentration of $DDT$ in grass was found to be $0.5\, ppm$ (parts per million),in sheep it was $2\, ppm$,and in man it was $10\, ppm$. Why was the concentration of $DDT$ maximum in the case of man?

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