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B
Paul Ehrlich
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C
Ram Deo Misra
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D
A. Tansley
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Solution
The correct option is B Paul Ehrlich Paul Ehrlich, an ecologist, gave the rivet popper hypothesis. The hypothesis explains the important role played by each species in an ecosystem. It compares the ecosystem with an airplane and says if you keep popping rivets (species), the plane will no longer fly. It also explains the role of different species in an ecosystem.