What meothod would you use to divide organisms into groups or classes based on specific characteristics?

To divide organisms into groups or classes based on specific characteristics, I would use a taxonomic classification method, which often includes hierarchical systems like the Linnaean taxonomy. This method categorizes organisms based on shared traits such as morphology, genetics, and evolutionary relationships, organizing them into domains, kingdoms, phyla, classes, orders, families, genera, and species. Additionally, cladistics can be employed to create phylogenetic trees that illustrate evolutionary relationships.