Concept:Filtration separates insoluble solids from liquids using a porous barrier.Explanation:Insoluble solids do not dissolve in the liquid.During filtration, the mixture is poured through filter paper.The liquid passes through as the filtrate, while the solid is trapped as the residue.Sublimation, evaporation, and crystallization do not primarily separate insoluble solids from liquids.Answer:B. Filtration