The Agriculture Revolution is about how farming changed a lot of things.
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So, before farming people relied on hunting for food. Now, they have farming so it's much easier. They don't have to travel to get food it's just there for them. They can now live in one place. It is called permanent Settlement.
Thats all !
They started to build small towns, then cities, then it turned into more and more. They can live in groups, they can also plant or grow more food then they needed.