Which type of erosion removes a uniform thin layer of topsoil by running water?

1. Running water erodes soil in several distinct patterns. 2. Sheet erosion strips a thin, even layer from the whole surface, which is why it often goes unnoticed. 3. Splash erosion is the first stage, where raindrops knock individual particles loose. 4. Rill erosion cuts small channels, and gully erosion deepens those into large ones. 5. Wind erosion is caused by moving air rather than running water, so it belongs to a different agent entirely. _Source: NECTA CSEE 2021 Geography 013, Question 1: Multiple Choice Items, item (ii)_