The organization of similar organisms into groups scientists understand how living things are related. it also allows scientists to communicate about all forms of life. scientists organize the living world using a process called taxonomy, which is the science of classifying organisms based on shared structures, functions, and relationships to other organisms. scientists use a branching system of classification, and over the years, due to new discoveries, the branching system has changed and grown. recently, scientists broadened the branching system of classification. currently, the broadest group is the a) class. b) domain. c) kingdom. d) taxon.