Answer;
-Class
Step-by-step explanation;
-There are seven major levels of classification: Kingdom, Phylum, Class, Order, Family, Genus, and Species.
-Class is the third level of classification is class. For example, Phylum Chordata has classes in it like birds, mammals (Mammalia) and reptiles. Classes are way to further divide organisms of a phylum. Organisms of a class have even more in common than those in an entire phylum.
-Organisms in each class are further broken down into orders. A taxonomy key is used to determine to which order an organism belongs.