The correct answer is - a) slump.
The slump is a geological occurrence that happens when a larger consolidated mass, usually composed of rocks, moves down, or falls down, a steep slope as one large mass. The movement or falling of the material is relatively short, and it can be only few ten meters, or few hundred meters. The slumps occur suddenly, usually without any warning sign, apart from the loud cracking noise few seconds before the material moves or falls down.
True. At a steeper gradient the velocity of the river is greater, combined with more discharge in the river the ability of the river to transport load increases as it has more energy.
2- East Germany and West Germany
West-the USA, Britain and France
East- Soviet Union
