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What is Eco System?
assertion and reason
asseretion= In, an ecosystem the amount of energy decreases from one trophic level to another.
reason= The path of energy transfer from one organism to another occurs in asingle direction
a) a and r are wrong b)r explains a c) a is correct and r is incorrect statement
what is gravtiy
hello how r u i want about slogans reated to deforestation
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