Answer:
The most compelling theory is that the birth of agriculture was facilitated by the end of the last glacial period, from 15,000 to 10,000 years ago (depending on the world region), which coincides with the era when agriculture first started.
The end of the last glacial period brought a warmer climate to many areas of the world, which meant that weather and soil conditions where more favorable for the cultivation of wild plants, and the domestication of animals.