Sieving is a process used to separate solid particles based on their size. It involves passing a mixture through a mesh or perforated material, allowing smaller particles to fall through while larger ones remain on top. This technique is commonly used in cooking, construction, and laboratory settings to ensure uniformity in materials. In cooking, sieving flour helps remove lumps and aerate it, resulting in a smoother texture for baked goods. In construction, sieving aggregates ensures that only the desired particle sizes are used in concrete and other materials. Overall, sieving is an essential method for achieving desired results in various applications.