Final answer:
The false statement about erosion is that it is always a slow process. Erosion can indeed occur rapidly through events such as landslides, earthquakes, and floods.
Step-by-step explanation:
The statement about erosion that is false is a) Erosion is always a slow process. While it's true that erosion can be a slow process, such as the wearing away of a mountain over millions of years, it can also occur rapidly.
Examples of rapid erosion include the effects of landslides, earthquakes, and sudden floods that can drastically alter landscapes in a short period of time.
Therefore, option d) Erosion can be both fast and slow is a true statement, as erosion comes in various speeds depending on the circumstances and forces at play.