The ozone layer is important because it protects life from damaging ultraviolet radiation. how did early life create the ozone layer?
a) water molecules on the earth were broken to release ozone.
b) volcanoes released the carbon dioxide needed to make ozone.
c) early bacteria and plants released the oxygen needed to make ozone.
d) early bacteria and plants released the carbon dioxide needed to make ozone.

The steps in the formation of extrusive igneous rocks are listed below in an incorrect order: 1. rock melts due to high temperature. 2. rock is buried deep under earth's surface. 3. magma is forced out of earth's surface during volcanic eruption. 4. lava cools and crystallizes to igneous rock. which of these best shows the correct order of steps in the formation of extrusive igneous rocks? 1, 3, 4, 2 2, 1, 3, 4 3, 4, 2, 1 4, 2, 1, 3