1. Bird population is seen to decrease due to thinning of egg shells which is caused by : a) Eutrophication b) Biomagnification c) Greenhouse Effect d) Ozone depletion

1. Bird population is seen to decrease due to thinning of egg shells which is caused
by :
a) Eutrophication
b) Biomagnification
c) Greenhouse Effect
d) Ozone depletion
by

1 Answer

Answer :

d) Ozone depletion
by

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