What defines an endangered species?

An endangered species is defined as a plant or animal that is in danger of extinction. This classification is typically made when a species experiences a significant decline in population size or habitat loss, putting its survival at risk. The status reflects a pressing concern for biodiversity and ecological balance, as endangered species often play critical roles in their ecosystems.

A species being labeled as endangered triggers various conservation efforts and legal protections intended to prevent further decline and encourage recovery. These measures can include habitat restoration, breeding programs, and legislation aimed at reducing threats from human activities such as poaching, habitat destruction, and pollution.

In contrast, options that refer to species with abundant populations, those that are thriving, or newly introduced species do not align with the definition of endangered. These choices describe scenarios where the species are either stable, thriving, or in a completely different ecological status, not at risk of extinction.