What factors played a role in the origins of agriculture?

I think it would be climatic changes. After the ice age, lands became a good ground to plant food resources. People learned through experience, observation, and survival the basic things to survive the world and finally stopped in a place and build their own homes and finally settle.  They learned that hunting is not enough to sustain their needs so they studied on cultivating their lands to produce their needed food.

B. total incorporation