You are presented with the question "Sand can be formed by which process?" and the following answer choices: 
- Continents drifting
 - mechanical waves
 - Photosynthesis
 - Sand Casting
 - movement of tectonic plates
 - Cellular Respiration
 - evaporation
 - Mechanical Weathering

Now knowing that the surface of a beach is formed by mechanical weathering and most beaches are of white coral sand, choose the best answer.


 

        Mechanical Weathering 