"To accommodate for lack of dependable rainfall" would be the best option as to why the ancient Chinese organized large groups of people to build and maintain irrigation systems, since when rainfall would not come for long periods of time, the crops would likely die without proper irrigation.
That would be the Munich agreement
The answer to this would be non-instental question
Answer:
I think maybe with the words from some famous writers books or speeches.
Constantine made Constantinople the capital of the Byzantine Empire in 330 because it was well protected, had a great location, and was wealthy. The city was rich and successful for so long because it was well protected by water on three sides and had land and sea walls!