One factor that distinguished the Americas from Eurasia in pre-Columbian era is that?

A large number of domesticated large animals, such as horses, donkeys, and oxen, were present in Eurasia, but not in the Americas. This distinction had a significant impact on the development of human societies in the two hemispheres.

* Transportation: The lack of large draft animals in the Americas made it more difficult to transport goods and people over long distances. This is one of the reasons why civilizations in the Americas developed more slowly than civilizations in Eurasia.

* Agriculture: The lack of large draft animals also made it more difficult to clear land for agriculture and to cultivate crops. This led to the development of different agricultural practices in the Americas, such as the use of slash-and-burn agriculture.

* Warfare: The lack of large draft animals also had an impact on warfare in the Americas. The absence of horses and other cavalry animals meant that the peoples of the Americas fought on foot or in canoes, rather than on horseback.

Despite the lack of large draft animals, the peoples of the Americas were able to develop complex and sophisticated societies. However, their development was different from that of the societies of Eurasia, due in part to the environmental differences between the two hemispheres.