When would seive be used during hand separation?

A sieve is used during hand separation when there is a need to separate smaller particles or solids from larger ones, particularly in mixtures where the size difference is significant. For example, when separating sand from gravel, a sieve allows the finer sand to pass through while retaining the larger gravel pieces. This technique is useful in various applications, including cooking, construction, and laboratory settings, to ensure the desired particle size is achieved.