LIFE SCIENCE

Detailed explanation-1: -Extinction is the death of all members of a species of plants, animals, or other organisms. One of the most dramatic examples of a modern extinction is the passenger pigeon. Until the early 1800s, billions of passenger pigeons darkened the skies of the United States in spectacular migratory flocks.

Detailed explanation-2: -Global extinction refers to the loss of species or other taxonomic units (e.g., subspecies, genus, family, etc.; each is known as a taxon) occurring when there are no surviving individuals elsewhere. The extinction of any species is an irreversible loss of part of the biological richness of the Earth.

Detailed explanation-3: -The three types of extinction are mass extinction, background extinction, and human-led extinction. Mass extinctions occur quickly and wipe out large amounts of species at a time.