Fossils are parts of an organism that decay but are somewhat preserved in rocks over time.
Fossils help with recording history and dating time eras
It helps scientist learn how the environment played a role in an organism's lives, it it helps them date to when the a organism lived and how old it is.
If creation is true, then there is a Creator to who we are accountable to. Evolution is an enabler for atheism. Evolution gives atheists a basis for explaining how life exists apart from a Creator God. Evolution denies the need for a God to be involved in the universe. According to the Bible, the choice is clear. We can believe the Word of our omnipotent and omniscient God, or we can believe in the “scientific” explanations of fools.