Elaborate more if u need an answer
Answer:
The answer to this question is D.All of these.
Ecosystem and pond,
not sure though but good luck !
True.
People began to settle Sumer around 4500BCE. The Sumerians were in control of the area by 3000BCE. Their culture was comprised of cities such as Eridu, Nippur, Lagash, Kish, Ur, and Uruk.