The variety of information is for example:
archaeological find
primary sources, such as video recordings, sound recordings or testimonies of wittnesses
background and context information
linking dependencies and motivations (for example: what was the motivations for the crusades?)
they collect this information to provide a comprehensive account of the events, but they do take into account that any new information could change how we view something.
They believed that the world was standing still and that it is curved. That is why on one side it seems as if the sun is rising and on the other it seems as if the sun is setting. They also believed later when Ra was created that it was related to him and that the sun coming out is his birth. There are many myths regarding this.
The answer is number four, land
A. Saying that the furrow is "pained" shows extreme unhappiness and discomfort.
