The extinction of biological clusters refers to the sudden death of a large number of organisms within more than one geographic area in a relatively short geological period, causing the number of biological species to suddenly and drastically drop in a short time.
According to the above definition, which of the followings belongs to the extinction of biological clusters?
At the end of the Permian period, about 250 million years ago, 96% of the species on the earth became extinct, of which 90% of marine life and 70% of terrestrial vertebrates became extinct