What helped people of the Neolithic era domesticate plants? clearing the land to raise crops
having more people to work on farms
developing new religions and belief systems
trading with people from nearby settlements

Clearing the land to raise crops

Explanation:

During the process to clear the land, humans began to understand how to deal with plants, and which species are better adapted to that kind of land. Plus, while understanding how to plant and crops, humans also tried to create tools and techniques to obtain the better of the plantation.  A good example is the use of canals to control the water and to use it in the plantation, but especially how to organize each part of the plantation.

well, there are a lot of places we get information about earth from. like science classes, websites, books, newspapers, etc.

because this was the year that the state of israel was formed