Step 1: Concept
Soil erosion occurs in stages, starting from raindrop impact to the formation of large gullies.
Step 2: Meaning
The term describes the process where thin, horizontal layers of topsoil are stripped away across a wide area.
Step 3: Analysis
Splash erosion is the initial impact of droplets, while rill and gully erosion involve concentrated channels. Sheet erosion is often "silent" because it removes soil uniformly without leaving deep scars initially.
Step 4: Conclusion
The removal of a uniform layer is specifically defined as sheet erosion.
Final Answer: (A)