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B
Eutrophication is a natural phenomenon in freshwater bodies
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C
Most of the forests have been lost in tropical areas
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D
Ozone in upper part of atmosphere is harmful to animals
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Solution
The correct option is DOzone in upper part of atmosphere is harmful to animals Ozone in upper part of atmosphere acts as an ozone umbrella and prevents UV radiations from reaching earth’s surface. UV radiations are harmful to the organisms.