Final answer:
The competition over resources and control is likely the source of war in the Middle East and South America based on their agricultural development.
Step-by-step explanation:
Based on the agricultural development in the Middle East and South America, it is likely that the source of war in these regions was the competition over resources and control. In both regions, the ancient peoples relied on farming and domestication of animals for their survival and livelihood.
The need for arable land, water, and other essential resources may have led to conflicts and warfare between different groups.