The correct answer to this open question is the following.
Although the question is incomplete because you did not attach references to the lesson, we can say the following.
One Mesopotamian contribution that I think had the biggest impact on human history was the development of agriculture techniques and the knowledge to know about the flooding of the Tigris and Euphrates Rivers, so Sumerians could use it for growing crops and to avoid some catastrophes.
The Sumerians were the oldest civilization on planet Earth. They settled in the middle of the above-mentioned Rivers in the Middle East region, modern-day Iraq. They developed great knowledge to built impressive buildings called Ziggurats and formed important city-states such as Uruk, Kish, Ur, and Lagash. Agriculture techniques were a big reason they could settle in these regions.
<span>Jasmine has not developed an understanding of object permanence.
</span>Object permanence refers to ability to perceive and understand that an object continues to exist even if it is covered, moved or no longer in sight. Jasmine has not developed an understanding of object permanence since she seems to believe that the ring of keys no longer exist once their were no longer in her sight (when her mother dropped them on the table behind Jasmine). This is why Jasmine cries when an object she likes appears to "vanish".
Answer:
Even as Rome was under attack from outside forces, it was also crumbling from within because of a severe financial crisis. Constant wars and overspending had significantly lightened imperial coffers, and oppressive taxation and inflation had widened the gap between rich and poor. In the hope of avoiding the taxman, many members of the wealthy classes had even fled to the countryside and set up independent fiefdoms. At the same time, the empire was rocked by a labor deficit.
Hope this helps
--Jay