Question

Before the Ordovician-Silurian extinction, the diversity of life on Earth was growing enormously due to _____.

1.shallow, warm, continental seas
2.overpopulation of land forests
3.cold, glaciated oceans
4.unknown reasons
5.comets hitting the earth

Answer 1

1.shallow, warm, continental seas

Answer 2

Before the Ordovician Silurian extinction, the diversity of life on Earth was growing enormously due to shallow, warm, continental seas. So your answer is the first one.