How is extinction defined in biological terms?

In biological terms, extinction refers to the disappearance of a particular species from the earth. This occurs when the last individual of that species dies, resulting in a complete loss of genetic diversity and the inability for that species to reproduce or survive. Extinction is a critical concept in biology, highlighting the fragility of ecosystems and the impact of environmental changes, human activities, and other factors that can lead to the permanent loss of species. Understanding extinction is essential for conservation efforts aimed at preserving biodiversity and maintaining healthy ecosystems.