(i)
(a) Birds are ***** more due to biomagnification.
(b) As the birds occupy the top most level in the given food chain, the maximum concentration of harmful chemicals causing biomagnification get accumulated in their body.
(ii)
(a) Biomagnification is the process of accumulation of non-degradable chemicals in the various trophic levels of food chains.
(b) As the chemicals are non-degradable or cannot be washed, they cannot be removed from the organisms of the food chain. This leads to gradual destruction of the ecosystem.
