The correct answer is c. access to water.
Indeed, the development of sedentary agriculture and farming, known as the Neolithic Revolution was only possible thanks to water sources which are indispensable to the proper irrigation of agricultural crops. All the archeological and historical evidence points to the Fertile Crescent, the fertile region located in Southwest Asia (Middle East) where the weather and access to water and to a varied fauna and flora made it possible for
Neolithic peoples to engage in sedentary farming that allowed them to experience a huge population growth and to established the first settlements and ultimately cities of human history. The process of domestication of wild crops into agricultural ones took a couple centuries. This radical passage from a culture of hunter-gatherers to cattle/farmers allowed the specialization of tasks and handcraft manufacturing which in turn evolved into more advanced technology and ultimately writing.
This revolution took place about 12,500 years ago or around 10,000 BC. This revolution occurred during distinct times and in different regions of the planet but the earliest evidence of such come from the Middle East.
