Q.Explain the Rivet Popper hypothesis.

[!TLDR] The Rivet Popper hypothesis compares an ecosystem to a plane held together by rivets (species); losing species one by one weakens it until it fails. …

[!ANSWER] The Rivet Popper hypothesis is an analogy explaining why even the loss of seemingly minor species threatens the stability of an entire ecosystem.

Proposed by the ecologist Paul Ehrlich, the hypothesis likens a functioning ecosystem to an aeroplane, held together by a very large number of rivets, with each species in the ecosystem represented by one rivet. Removing a single rivet (i.e. the loss of one species) is unlikely to bring the plane down immediately — the aircraft's structure has enough redundancy to absorb a small amount of damage. However, as more and more rivets continue to be removed, essentially at random and without any obvious warning, the structural integrity of the plane is progressively and cumulatively weakened. At some unpredictable point, the loss of one more, seemingly ordinary rivet (species) can trigger a sudden, catastrophic structural failure — the ecosystem's equivalent of a plane crash. …

• Forgetting to name Paul Ehrlich as the proposer of the hypothesis.
• Missing the key point that the hypothesis is specifically about unpredictability …