Answer :

Paul Ehrlich assumed ecosystem as an airplane joined by thousands of rivets which denotes the diverse species. If every passenger starts popping out the rivet, the flight would not be safe, furthermore which rivet is removed is also important.

If the human starts destruction of the natural resources then it would result in the extinction of the species. This would imbalance the whole ecosystem. And the rate of destruction depends on the key stone (ecotone) species. If the ecotone species is removed it would be a more critical factor in the destruction of the ecosystem.

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