What is the slowest agent of erision?

The slowest agent of erosion is typically considered to be soil creep, which is the gradual, downhill movement of soil and rock materials due to gravity. This process occurs very slowly, often at rates of just a few millimeters per year, and is influenced by factors like freeze-thaw cycles, moisture changes, and vegetation. Over time, soil creep can significantly alter landscapes, but its effects are not immediately noticeable.