If the actual population in a country is less than the optimum population, then?

If the actual population in a country is less than the optimum population, then it is desirable to have a larger population. This is because a larger population can mean more economic activities, more productivity and possibly greater economic growth. However, having a larger population without a corresponding improvement in technology or infrastructure to support the population can lead to resource depletion and overuse of the available resources. Therefore, it is important to strike a balance between the population size and available resources to ensure sustainable economic growth and development.