Relative location isn't the exact location so they would have to be using their mental imagery of a map. For example, after you go to fro a place so many times, you will grow accustomed to it thus by using mental imagery of a map would be a good answer.
Answer: it gives water
Drinking, cooking, electricity or hydroelectricity
We can use it to grow food or use it in hydroponics
We can filter it into drinking water
Answer:
Africa is the only country having lowest human development
