How can Fossils help to prove Evolution?

-A Fossil is simply a Trace of an Animal or Plant that lived a long time ago. -They can tell us what they Looked like, and how Long ago they Existed. Deeper the Rock = Older the Fossil -If you are able to arrange the Fossils in Chronological order, you can see the Changes over the period of x years, and this then can back Evolution because you can see how it has Changed and Developed