Which of the following defines a species that requires special protection to survive due to its small population?

The term that defines a species requiring special protection for survival due to its small population is known as an endangered species. An endangered species is one that is at severe risk of extinction due to various factors such as habitat loss, low reproductive rates, or other environmental pressures. The classification indicates that the species has dwindled to a point where its survival is critically threatened, necessitating immediate conservation efforts to prevent its potential extinction.

Understanding the nuances of species classifications is important; threatened species, for example, are those that may become endangered in the foreseeable future. In contrast, extinct species no longer exist, and vulnerable species are at risk of becoming endangered if the factors threatening their survival are not addressed. Recognizing these distinctions helps in crafting effective environmental policies and conservation strategies.