Which of the following groups of people are MOST likely to have a slow life history?

Question

BlackTom AI · Accepted Answer

Life history theory distinguishes strategies that organisms use to allocate limited resources between growth, maintenance, and reproduction. Slow life-history strategies emphasize delayed reproduction, fewer offspring, high parental investment per offspring, and long-term orientation; fast strategies emphasize earlier reproduction, more offspring, lower per-offspring investment, and risk-taking when mortality or unpredictability is high.

1. Relevant knowledge points and concepts
- Trade-offs: energy devoted to producing many offspring reduces energy available for caring for each one.  
- Environmental cues: stable, resource-rich, low-extrinsic-mortality environments favor slow strategies; unpredictable, high-mortality or resource-poor environments favor fast strategies.  
- Behavioral correlates: slow strategy → delayed childbearing, fewer children, high parental investment, future planning. Fast strategy → earlier and more frequent reproduction, less investment per child, present-focused behavior.

2. Step-by-step reasoning
- Identify which option reflects high parental investment and low reproductive rate: “parents who have only one child” directly indicates very low fertility and concentrated investment per child.  
- Apply the life-history mapping: having only one child is a clear behavioral manifestation of prioritizing offspring quality over quantity, consistent with delayed reproduction and long-term planning—hallmarks of a slow life history.  
- Contrast each other option with these criteria (below).

3. Intermediate conceptual steps
- Determine environmental implication: slow strategies require conditions that allow parents to expect returns from investing heavily in one child (stability, resources). Choosing one child implies such expectations.  
- Evaluate alternative options against core features (timing of reproduction, number of offspring, parental investment).

4. Why the correct answer is correct
Parents who choose to have only one child are allocating maximal resources and care to a single offspring, signaling a strategy of high investment per offspring and low reproductive rate—exactly the slow life-history profile.

5. Why other options are incorrect
- Traditional hunter-gatherer societies: may show intermediate patterns (long weaning, spacing births) but historically faced higher extrinsic risks and variable resources; not a straightforward example of the high-investment, low-fertility modern slow strategy.  
- Community during a war or plague: high extrinsic mortality and unpredictability push toward fast strategies (earlier, more reproduction).  
- Individuals in dangerous neighborhoods with poor prospects: environmental harshness and unpredictability typically produce fast strategies (earlier reproduction, more offspring, less long-term investment).

6. Conclusion
Therefore, “parents who have only one child” best fits a slow life-history strategy, which matches the provided correct answer.

Which of the following groups of people are MOST likely to have a slow life history?单项选择题

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