Civilization in each region developed advance math,science, and engineering.
Technically, the only way to correctly answer this question is to read the document itself but the answers pretty simple to answer without it too.
The Nile was the holy grail for the people of ancient Egypt. After all, it provided water to drink, and also water for agriculture. It also provided the Egyptians with many fertile lands that were great for farming. Because of this, they prayed to their gods all the time so that the Nile wouldn't dry out.
Copyright law is a restriction of other people to illegal use and distribution of any of a creator’s work without his/her consent. Its main purpose is to give an exclusive right to a creator to protect its work from infringement for the benefit of ownership.
Most hills are "B. Not steep", since for it to be a hill it needs to be somewhere in between the elevation of flat land and mountainous land, which of course is much higher and usually steeper.
A)a new defensive tactic known as trench warfare
Trench warfare allowed the war to drag on for long periods of time because of the stalemates that ensue from the opposing armies refusing to give up the land under their controls, resulting in high casualties in no man's land.
Hope this helps
