There were a good bit of reasons, but mainly because they wanted power.
Answer: Germany
Explanation: Germany seting the comands of unrestricted sumbarine warfare was one reason, unrestricted sumbarine warfare sunck any ships aiding the allies. A nother factor was the Zimmermann Telegram which germany sent to mexico to invade the united states.
Answer:
The growth, or development, of city populations
Explanation:
The river's predictability and fertile soil allowed the Egyptians to build an empire on the basis of great agricultural wealth. Their farming practices allowed them to grow staple food crops, especially grains such as wheat and barley, and industrial crops, such as flax and papyrus
I think the answer is A or B
