Erosion is the process of eroding or being eroded by wind, water, or other natural agents. Erosion occurs in many things like rain water hitting the ground or wind hitting mountains. These processes are always happening without stop.
Winds are named based on the direction from which they emanate.
What factor determines how winds are named?
Basically, winds are named judging from the direction from which a particular wind has originated.
For instance, when a wind originates from the west coast, it is likely that its name would indicate that it started from the west.
In essence, the correct portion in this case, is the one that indicates the direction of the wind being a major factor that would be considered when forming its name.
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