Step-by-step explanation:
1. Asia on maps or its own plate.
2. Himalayas
3.Would provide defense and isolate them.
4. Suru River and Beas River
5. It had a fertile valley full of silt and ample defense.
6. Arabian sea, Indian Ocean and Bay of Bengal
7. Agricultural Revolution
8.Vedic Civilization
9. The cities were built on a grid layout and had plumbing
10.Likely destroyed by Indo-Europeans
11. Aryan people took over the valley
12. A system where people were assigned class at birth and only move up by dying and being reincarnated into a better life.
13. It was because it showed a remarkable ability in grid layouts and pluming.