How did farming lead to the development of social class?

So back in history, people didn’t know how to farm so they were hunters and gatherers, always moving never settling in one place for too long. However one day these people were like let’s just try to plant a see and see what happens. Long story short the plants grew and this started societies based around places that grew food and causes different people to explore different professions to develop which in turn would create social classes

Where is the map? explain the choices?