The major obstacle to Islamic expansion in India was the presence of the Rajputs, a traditional patrilineal clan/warrior ruling class.
The mountain ranges were natural barriers to invading forces and stopped people from coing into india.
Senator William Borah was an outspoken Republican United States Senator, one of the best-known figures in Idaho's history. A progressive who served from 1907 until his death in 1940, Borah is often considered an isolationist,for he led the Irreconcilables, senators who would not accept the Treaty of Versailles, Senate ratification of which would have made the U.S. part of the League of Nations.
Answer:
The compass
Explanation:
A compass can be defined as an electronic or magnetic instrument (device) designed and developed to determine cardinal location and direction from a reference point. It is embedded with the four cardinal points of the Earth; north, west, south and east.
The compass was a piece of technology which allowed the Portuguese to set up their trade empire throughout the Indian Ocean region.
Basically, it was used to find their bearing and direction.
