in which four regions did the world's first farmers live ?

The correct answer is Sumeria-Mesopotamia, Egypt, China, and the Indus Valley.
Four of the regions where the first farmers lived were Sumeria-Mesopotamia, Egypt, China, and the Indus Valley.
Sumeria-Mesopotamia cities were located between the Rivers Tigris and Euphrates, in the heart of the Middle East. The proximity with these rivers allowed these first civilizations to be good farmers and to develop prosperous nations. The same happened in Egypt. Ancient Egypt settled cities next to the Nile River, and they became good farmers that depended on agriculture for quite some time. Something similar happened with China and the Indus Valley civilizations.
Looking at the map, the four regions in which the world's first farmers live are the following:
This is because all these four regions were known to be the point where civilization began.
Also, all these places are near rivers which aid agriculture by making the surrounding land fertile.
The rivers near these places also aid the irrigation system which helped the farming process during drought season.
Hence, in this case, the correct answers are Sumeria-Mesopotamia, Egypt, China, and the Indus Valley.
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