Which of the following is largely responsible for the modern-day political boundaries in the south asian realm?
a) mountain ranges
b) british rule
c) oceans and seas
d) monsoon rains

b) British rule

Explanation:

The southeast Asian realm is the largest of the realms of the world that includes the continents of the India, Pakistan, Bangladesh, Sri Lanka, Nepal and Bhutan with those linked to that of the Afghanistan and the Maldives that refers to the south Asian realm and being located under monsoon type of the remained under the British rule.

Earthquakes and tsunamis