Answer:
Efforts to provide adequate water resources for Africa will, therefore, face several challenges, including population pressure; problems associated with land use such as erosion and/or siltation; and possible ecological consequences of land-use change on the hydrological cycle.
You see how much the scale is, let's say that it is 150 mm=300 miles. If it goes over, you can measure it with a ruler, or move with your hands, measuring it as well as possible and estimating. Hope this helps! :)
A. That’s what I think.
Hope this helps
