Final answer:
The concurrent Agrarian lifestyle was a period when agriculture was adopted alongside hunter-gatherer practices. It led to permanent settlements and civilizations but was not universally chosen due to increased labor and reduced leisure time.
Step-by-step explanation:
The concurrent Agrarian lifestyle refers to the period when agriculture was integrated with a predominant hunter-gatherer way of life. It highlights a significant transitional phase in human societies, which started as early as the third millennium BCE. The move to agriculture, however, was not uniform or universally accepted due to several perceived disadvantages when compared with the hunter-gatherer approach, such as reduced leisure time and increased labor, especially for women.
In agrarian societies, life revolved around the seasons and the arduous work of farming. This was markedly true in Europe's feudal society, where tilling the soil and planting crops like wheat and barley were critical for survival. The reliance on agriculture led to permanent settlements and the growth of civilizations, such as those along the Tigris, Euphrates, Nile, Indus, and Yellow Rivers. Despite the benefits of domesticating plants and animals, some groups opted to remain hunter-gatherers, given their specific environmental conditions and needs.