Answer:
The accumulation of food surpluses.
Explanation:
According to a different source, these are the options that come with this question:
<em>The accumulation of food surpluses.</em>
<em>The invention of the wheel.</em>
<em>The development of coins.</em>
<em>The advent of warfare.</em>
The accumulation of food surpluses was the main reason why ancient civilizations became urban and organized. As agriculture developed and became more systematic, people began to enjoy a stable source of food. This was a great advantage as it allowed people to have time to spend on other matters. This free time led to the development of artisans, merchants, the aristocracy, and other social classes. Moreover, as food surpluses continued, populations became larger, which led to the creation of larger and better organized urban centers.
