Question

Why are fossils considered important in the study of evolution explain two ways by which fosills can be estimated?

Answer 1

fossils are important because they show us the evolution of species even if they are more than thousand years older.

there are two components to this estimation one is relative if we take into the earth and start finding fossils it is reasonable to suppose that the fossils we find closer to the surface are more recent than the fossils we find in deeper layers.