Question

What are fossils? What do they tell us about the process of evolution

Answer 1

Fossils are the preserved traces of living organisms which were formed millions of years ago.
They tell us about the evolutionary relationship with the present living organisms. They estimates how far the evolutionary relationship go.

Answer 2

the remains of Dead plants and animals which were buried under the rocks millions of years ago are called fossils.
when organisms die their body decomposes but sometimes some part remains in contact with environment doesn't decompose . These preserved traces of living organisms are called fossil.
fossils tell us about the process of evolution. the forces of different organisms has some features that are similar to other species. in this way they show links between two species.