This graph represents the temperature over the time spand of 110 years. The vertical axis is the temperature in celsius and the horizontal axis is the years from 1880 to 1990.

 

Forest soils form in temperate regions that receive enough rain to support the heavy growth of trees. Rainfall is important for the grassland soils because it needs a wet and warm environment so it breaks down rock and turns into soil. Both kinds of soil it's important to have large amounts of rainfall in order to produce the classification of soil. It just works differently to the way it is used to create soil.