ICSE Class 8 Answered

A small over populated country can be prosperous if its population is healthy, skilled and uses technology to utilize limited resources efficiently.

It can also be under developed if the population is unskilled, illiterate, use old technologies with agriculture as the main occupation of the people. 

In short, we can say that the quality of population, level of industrialisation and the use of advanced technology are two factors that determine the development of the country irrespective of its size.