Final answer:
To separate sand and water, the filtration method is typically used, which involves passing the mixture through filter paper to retain the sand while water flows through.
Step-by-step explanation:
The separation technique most likely to be used to separate sand and water would be filtration. Filtration is a physical method of separation where a heterogeneous mixture of solid and liquid, such as sand mixed with water, can be separated. In this process, water passes through a filter paper or another porous material and becomes the filtrate, leaving the solid sand particles behind on the filter. This approach is effective for mixtures where the solid particles are suspended and are larger than the pores of the filter medium used.