This document provides information about wildlife extinction and endangered species. It defines the terms "extinct" and "endangered" and discusses some of the main causes of species extinction, including changes in the environment, disease, competition from other organisms, and human activity. It also describes some ways that endangered animals can be protected, such as protecting habitats, breeding programs, and making certain types of hunting illegal. The document includes vocabulary words related to these topics and an activity where students practice a conversation about guiding tourists to see different types of animals.