The branch of science that focuses on the classification of living organisms is known as taxonomy. This field categorizes organisms into hierarchical ranks, such as domain, kingdom, phylum, class, order, family, genus, and species. Taxonomy aids in organizing biodiversity and understanding evolutionary relationships among species. By categorizing organisms, scientists can communicate effectively about them and study ecological roles, behaviors, and characteristics that define various groups of life. This branch helps to identify new species and track environmental and conservation issues, thereby facilitating efforts in biodiversity conservation.