The correlation between the ages of husbands and wives can be positive, negative, or zero. However, the correct answer is option 'A', which states that the correlation is positive.

Explanation:

Correlation refers to the statistical relationship between two variables. In this case, we are interested in the correlation between the ages of husbands and wives. If the ages of husbands and wives tend to increase or decrease together, then we say that there is a positive correlation between them. On the other hand, if the ages of husbands tend to increase as the ages of wives decrease, then we say that there is a negative correlation between them. Finally, if there is no relationship between the ages of husbands and wives, then we say that there is a zero correlation between them.

Several studies have shown that the correlation between the ages of husbands and wives is positive. This means that as the age of husbands increases, the age of wives also tends to increase. There are several possible reasons for this positive correlation:

- Social norms: In many societies, it is common for men to marry women who are younger than them. However, the age gap between husbands and wives tends to decrease as both partners grow older. This could explain why the correlation between their ages is positive.
- Similar interests and lifestyles: Couples who are similar in age may share similar interests and lifestyles, which could contribute to a stronger relationship. As a result, they may be more likely to stay together as they grow older, which could explain why their ages tend to increase together.
- Health and longevity: Research has shown that couples who are similar in age tend to have similar levels of health and longevity. As a result, they may be more likely to age together and reach similar milestones in life, which could contribute to a positive correlation between their ages.

In summary, the correct answer is option 'A', which states that the correlation between the ages of husbands and wives is positive. This means that as the age of husbands increases, the age of wives also tends to increase. There are several possible explanations for this positive correlation, including social norms, similar interests and lifestyles, and health and longevity.