classifying is when zero kidneys something by antitype & a window of something wing a antitype of something ->  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 they are formed  rocks can be classified by how they are formed & window is a public of a stone and includes support of sedimentary / metamorphic / igneous -> rocks are classified as igneous, sedimentary, or metamorphic based on how they are formed