Answer:
1. The most of Earth's surface was covered with ice and snow.
2. Earth began getting warmer.
3. Wild fruits, vegetables and grains began growing in fertile regions.
4. Hunter-gatherers began settling down in regions with abundant vegetation.
5. Most humans gave up hunting and began practicing agriculture.
Explanation:
It is not clear why exactly humans shifted from hunting and foraging to practicing agriculture. There are many theories. Some researchers think that farming was an efficient way to get food, but farming in its earliest stages wasn’t very productive, as hunter-gatherers probably lacked proper tools and didn't have a sense of private property rights. Researchers agree that, along with farming, a system of property rights had to develop, and that people were more likely to start practicing agriculture if they were in small groups, akin to family units, with farming-friendly property rights. But, archaeologists don't have enough evidence to prove any of these theories, so we can only keep guessing why exactly humans left hunting and turned to farming.
