Answer:
The Tigris and Euphrates rivers made it possible to grow wheat on the arid Mesopotamian plains, but the dry climate eventually defeated human engineering. Irrigation brought water to fields faster than it could drain out. As salt-rich groundwater rose and surface water evaporated, mineral salts built up in the soils. Farmers switched to more salt-tolerant grains like barley, but the harder they farmed, the less they harvested. After about 2,000 years, the once-fertile land of southern Mesopotamia was barren.
Explanation:
♥ Aryans may have have invaded, we still do not know for sure.
♥ Indus River changed courses
♥ A major drought accrued.
♥ Too much flooding causing the destruction's of many crops.
Clearly define the scope of your project.
Carefully select the members of your team.
Outline your goals and keep them SMART.
Manage your data.
Monitor progress daily.
Engender internal motivation in your team.
Manage your resources wisely and prudently.
Check this answer before you do.<span> the GED, HiSET, or TASC test. Although some of the content will be slightly different, these tests are similar in many ways.</span>
