<span>Erosion by rivers is a main valley-forming
process; other processes, such as movement of the earth's crust and
glaciers, also have an important part in some cases. The rate at which a
river deepens its valley depends on several factors.</span>
Landslides and avalanches are the most dramatic, sudden, and dangerous examples of earth materials moved by gravity. Landslides are sudden falls of rock, whereas avalanches are sudden falls of snow.
Answer:
Because of the influence of colonial rule. There is also another reason: to unify all languages.
6. If the air temperature remains constant, evaporating water into the air will increase the dew point and increase the relative humidity.
