Questions: One reason women may not be as attracted to substantially older men, relative to slightly older men, is that substantially older men

The answer is the fourth one (4): are less likely to be able to invest long-term in her and her offspring.

Explanation for each option:

1. are more physically active: This option is incorrect because being more physically active is generally seen as a positive trait and would not typically be a reason for reduced attraction.

2. do not have as many resources: This option is incorrect because, in many cases, older men may have accumulated more resources over time compared to younger men.

3. are less likely to invest in her and her offspring: This option is partially correct but not as precise as option 4. It suggests a lack of willingness to invest, rather than the ability to invest long-term.

4. are less likely to be able to invest long-term in her and her offspring: This option is correct because it addresses the concern that substantially older men may not be able to provide long-term support and investment due to potential health issues or a shorter remaining lifespan.

Summary: Women may not be as attracted to substantially older men because these men are less likely to be able to invest long-term in her and her offspring.