Answer;
-A key
A sorting device made up of a system of choices that is used to classify organisms is called a key.
Step-by-step explanation;
-Living organisms can be classified according to their characteristics. Keys can be used to identify different species. A key will usually ask questions based on easily identifiable features of an organism.
-For example, dichotomous keys use questions to which there are only two answers. They can be presented as a table of questions, or as a branching tree of questions.