How were the economies of ancient mesopotamia, egypt, and the indus valley similar?

   All these economies rested on agriculture thanks to the fertile plains around the river valleys

Explanation:  Ancient Mesopotamia grew up in the valley of the Tigris and Euphrates rivers, India along the Indus River and Egypt in the Nile Valley. This means that on the basis of rich agricultural yields, they could gradually develop, enrich over the time and use the same rivers to transport goods and exchange goods, which was a precondition for progressing to the size of civilizations as we know them from history.

the enslavement and death of yeet

there are hundreds of postives ways to unite a country with another country here are a   few

1 peace treaty's peace treatys

are basically a document signing a allliance with one country and another.

2 gift

what i mean by this is for example how the french gave the americans the statue of libery a gift of peace.