Answer: The answer is: surplus.
Explanation: Since the Sumerian civilisation developed between rivers in the fertile plain, therefore, thanks to agriculture, combined with the rainy seasons during the year, meant that they were able to produce large quantities of food. That food was necessary for life, and any excess food could be exchanged for some other good, which was in fact a precondition for development. Every surplus of food, growing bigger and bigger, meant an exchange for something else that was needed, and over time, it had grown to such an extent that this exchange meant wealth, power and dominance in the ancient world.
Of course, this exchange of surplus food for other goods contributed to the development of trade with their neighbours, which was a prerequisite for the development of the empire. Thus, a trading system was developed that included established trade canals and their development and promotion, as well as writing trade agreements with a wedge-shaped letter, for easier, faster and more efficient trade.
People at this stage continued to progress and survive due to activities such as gathering and hunting. Now the Stone Age period can be divided into pre-Stone Age, middle Stone Age and modern Stone Age. Now each period showed developments in some or the other way. Initially, fire was invented and the invention was quite phenomenal. Even today most explorers prefer to use stones to lit fire. The same fire was then used to sharpen instruments and objects. These inventions or so called developments are still the same. Maybe the instruments might be different. Next, man tried to make instruments mainly weapons for his everyday purpose. Weapons included axes, spears, scrapers, awls, knives and hand axes mainly made of stone. These weapons were enough to protect themselves from wild animals and enemies. The other purposes of these weapons were for hunting, fishing and butchering purposes.
The 1AD was the first armored division of the United States' Army to see battle in World War II.
<h3>What is the 1st armored division?</h3>
In 2003, the division became the largest division-based task force in US. Army History.
The armored division was involves in the Korean War, Cuban Missile Crisis, Persian Gulf War, Iraq, Afghanistan war etc.
In conclusion, the 1AD was the first armored division of the United States' Army to see battle in World War II.
Read more about 1st armored division
<em>brainly.com/question/7069876</em>
#SPJ11