They never settled in one certain place they continue to move to satisfy their needs in that location.
It is one of the places that are vertices on the Earth.
Answer: d) scale
When using a map, the scale will help you determine the distance between two cities on a map. Moreover, the map scale will give you a direct reading of actual distance between two points on the map for it describes the relationship between distance measured on a map and the actual distance that represents the Earth's surface. Therefore, knowing the scale of the map makes it possible to measure distance, determine the area, and compare the size of the two cities.
With war, every country is afraid. They're afraid of possibly being ambushed, becoming in dept, and many other reasons. So by remaining neutral they can sit back and not have to worry about being attacked by any country that's fighting. But that's not always the case now and days. Hope I answered your question correctly.