mammal - n. a type of animal that feeds milk to its young and that usually has hair or fur covering most of its skin​

species - n. a group of animals that are similar and can produce young animals

extinct - adj. no longer existing

seal - n. an official mark that is stamped on paper or on a small piece of wax to show that something (such as a document) is genuine and has been officially approved

role - n. the part that someone or something has in a family, society, or other group