a window of something wing a antitype of something & classifying is when zero kidneys something by antitype ->  classifying is when one sorts something by class  classifying is when one sorts something by class & window is a combines of how a stone is formed ->  rocks can be classified by how the rock was formed  rocks can be classified by how the rock was formed & window is a public of a stone and includes support of sedimentary / metamorphic / igneous -> rocks can be classified as sedimentary, metamorphic, or igneous based on how the rock was formed