The correct answer is - failed. The African nations with their peacekeeping efforts completely failed in their mission in Sudan. They did not managed to keep the peace at all, and everything continued as if they were not present on the terrain. The mission lasted for around three years, from 2004 till 2007, and after the United Nations saw that there's no effect from it, the AMIS (as it was called) was replaced by UNAMID, peacekeeping forces from the United Nations.
Yes aids had done more harm than good. The reason why because people in Africa didn't have aids and when aids started to spread around the whole world the Africa gotten so sick they started to die.
Dune deflation hollows are where wind has removed sand down to a level where a layer of particles too heavy for the wind to move (an armoured surface) stabilises the sand and prevents the surface being lowered further.
A crevasse is a deep, wedge-shaped opening in a moving mass of ice called a glacier. Crevasses usually form in the top 50 meters (160 feet) of a glacier, where the ice is brittle.
a mass of rocks and sediment carried down and deposited by a glacier, typically as ridges at its edges or extremity.
