The early peoples settled in one place and needed to find more food
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early people were hunter gatherers and not farmers, therefore when their food source ran low, they had to move on to a new place
they know that by discovering plant.
Nomads were people who moved in search of food, while hunter-gatherers got food by gathering wild food sources and hunting.
Thay domesticated the plants they saw.
Warmth, cooking, defense, making tools and weapons (fire hardened sticks) making pottery, preserving food (smoking/drying food)
it affect it cause there was no water