If you look on openstudy.com they have lots of answers to this :-)
<span>When magma reaches the surface through a volcano, it is called lava. When lava cools, it forms extrusive igneous rock. The process by which rocks are worn down by wind and water, creating sediment.</span>
The answer is faults because when divergent boundaries occur, the tectonic plates move away from each other, therefor creating a fault in the earths crust.
