Elimination is the biological process through which the body removes waste products and undigested food. This process is essential for maintaining health, as it helps to rid the body of toxins and excess substances. The primary organs involved in elimination include the kidneys, which filter blood to produce urine, and the intestines, which expel solid waste. In addition to its biological significance, elimination can also refer to the removal of something unwanted or unnecessary in various contexts. For example, in mathematics, elimination is a technique used to solve systems of equations by removing variables. This concept is applicable in many fields, including science and engineering.