Among the countries on the margins of the south asian region, population growth is highest in?

The correct answer is - Afghanistan.

The country of Afghanistan is the country that has the biggest population growth in the South Asia region. It has an annual population growth of 2.34%, and it ranks at number six on the whole continent. It is followed by Pakistan, as second in the South Asia region, with population growth of 1.45%, which puts Afghanistan way upfront of any competition in this region.

because there are alot of mountains