Concept:Economic development is hindered by factors that strain limited resources and slow per-capita improvements.
Explanation:Rapid population growth increases the demand for food, healthcare, education, and jobs.
When population rises faster than output, the benefits of growth are spread too thinly.
This reduces savings, limits investment, and lowers income per head.
In contrast, skilled labour, economic growth, and political stability all support development.
Therefore, the main hindering condition is rapid population growth.
Answer:D. rapid population growth