It could help them if they pour a bottle of water on soil that has the max water it could hold they could find out just how Watered the ground is. Hope this helps!
Answer:
D: telegraph
I am not pretty sure but this one looks pretty close to the question!
The strip of land that became the site of the Sumerian and the Babylonian civilizations (between Tigris and Euphrates) was known as the Fertile Crescent