Which of the following extinctions was triggered only by major glaciation? Ordovician Siturian Permian - Irlassic Late Devonian Triassicthurassic

The correct answer is Ordovician-Silurian.The Ordovician-Silurian extinction, which occurred approximately 443 million years ago, is believed to have been triggered primarily by major glaciation events. These glaciation events led to significant changes in sea levels, ocean circulation, and climate, which in turn caused widespread environmental stress and the extinction of many marine species.