Concept:A population that is too small relative to its available resources is termed under-populated.
Explanation:Under-population occurs when the number of people in a country is too small to make full use of its available resources.
This means the existing resources, such as land and capital, could support a much larger population without lowering the people’s standard of living.
In such a situation, the country's resource base remains underutilised, not because resources are scarce, but because there are not enough people to exploit them efficiently.
Therefore, the condition described in the question matches the definition of under-population.
Answer:C. under populated