Which of the following does not increase, when people are healthy

Options

A. economic prosperity
B. work efficiency land productivity
C. infant and maternal mortality
D. longevity of people

Answer

To solve the question "Which of the following does not increase when people are healthy?", we need to analyze each option provided:

1. **Economic Prosperity**: When people are healthy, they tend to work more efficiently and effectively. This increased productivity can lead to higher earnings and overall economic prosperity. Therefore, economic prosperity does increase when people are healthy.

2. **Work Efficiency**: Healthy individuals are generally more productive and can perform tasks more effectively. This leads to an increase in work efficiency. Thus, work efficiency also increases when people are healthy.

3. **Land Productivity**: Similar to work efficiency, when individuals are healthy, they can manage their land and resources better, leading to increased land productivity. Hence, land productivity increases with the health of individuals.

4. **Infant and Maternal Mortality**: This option refers to the rates of death among infants and mothers during childbirth. When a population is healthy, we would expect these rates to decrease rather than increase. Healthy populations typically have better healthcare access, leading to lower mortality rates. Therefore, this option does not increase when people are healthy.

5. **Longevity of People**: Longevity refers to the length of life. Healthy individuals tend to live longer lives due to better overall health and well-being. Thus, longevity increases when people are healthy.

After analyzing all the options, the only one that does not increase when people are healthy is **Infant and Maternal Mortality**.

### Final Answer:
**Infant and Maternal Mortality** does not increase when people are healthy.