Answer:
extinct.
Step-by-step explanation:
Extinction refers to the complete eradication of a species, meaning that there are no living individuals of that species left on Earth. This can happen due to various reasons, including habitat destruction, climate change, pollution, overhunting, or competition from other species.
When a species goes extinct, it means that it has failed to adapt and survive in its environment or has been unable to overcome the challenges it faces. Extinction can have significant ecological and environmental impacts, as it disrupts the balance of ecosystems and may lead to the loss of important ecological functions.
There are numerous examples of extinct species, such as the dodo bird, the passenger pigeon, and the woolly mammoth. These species are no longer found in the wild, and their extinction serves as a reminder of the importance of conservation efforts to protect endangered species and their habitats.
In summary, when a species completely disappears from existence, it is considered extinct, signifying the permanent loss of that particular species from the Earth.