In "rivet popper hypothesis" rivet indicates?

Options

A. Community
B. Biosphere
C. Ecosystem
D. Species

Answer

To answer the question regarding what "rivet" indicates in the "rivet popper hypothesis," we can break it down step by step:

### Step-by-Step Solution:

1. **Understanding the Rivet Popper Hypothesis**:
The rivet popper hypothesis was proposed by Paul Ehrlich. It uses the metaphor of rivets in an airplane to illustrate the importance of biodiversity in ecosystems.

2. **Significance of Rivets**:
In this analogy, rivets represent different species within an ecosystem. Just like an airplane needs a certain number of rivets to maintain its structure and function, ecosystems require a variety of species to function properly.

3. **Consequences of Species Loss**:
The hypothesis suggests that the loss of certain species (or "rivets") can lead to the collapse of the ecosystem. While some species may be more critical than others, the overall health and stability of the ecosystem depend on the presence of a diverse range of species.

4. **Conclusion**:
Therefore, in the context of the rivet popper hypothesis, "rivet" specifically indicates "species." The loss of these species can have detrimental effects on the ecosystem, much like losing rivets can compromise the integrity of an airplane.

### Final Answer:
In the "rivet popper hypothesis," rivet indicates "species."

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