What is the primary purpose of the filtration process?

The primary purpose of the filtration process is to separate solid particles from liquids or gases. Filtration is a physical separation technique that utilizes a porous medium, such as filter paper or a membrane, which allows only the fluid (liquid or gas) to pass through while trapping the solid particles. This process is widely used in various applications, including water purification, coffee brewing, and laboratory experiments, to obtain a clear liquid or gas while removing any unwanted solid impurities.

In contexts like chemistry, this separation is crucial for ensuring the purity of substances and obtaining accurate results in analyses or reactions. The remaining options involve processes that do not align with the definition or purpose of filtration. For example, evaporating liquid from a solid requires heating rather than filtering, and combining different liquids or mixing solids into liquids suggests interactions that are not relevant to the separation goal of filtration.