Question

How have mountain passes been helpful to India since historic time?

Answer 1

--> they helped foreigners to invade india ex:khyber.
-->they played a major role in buisiness,warfare and relocation.
--> these shown a way for the people belonging to buisiness sectors..
-->and these mountain passes created a mountain route between some places.
-->this is located in the uppermost of the route.
-->this passes helped kings to discover new places and to conquer.
-->these are also called as saddles,gaps,notches etc.......
-->and these helped by showng a way to  the traders to trade on this land.
-->this recollects the memories of history.
-->and the khyber pass has been one of the greatest gateway for the invasions of india.