Answer please I rlly need help !

Which is the best example of a primary source ducument useful in the study of history ?

What is the name of the social stratification set up by the vedic peoples of the indus river valley civilization

23. how does specialization among nations encourage interdependence? nations work together to share labor and resources to produce vital goods. nations sign treaties prohibiting taxes on imports. nations produce specific goods and then trade to obtain things they need. nations that are more developed agree to fund development in nations with limited industry.