The remains (or impressions) of dead animals or plants that lived in the remote past are known as fossils.
A fossil provides evidence for evolution.
Fossils provide evidence that the present animals (and plants) have originated from the previously existed ones through the process of continuous evolution.
Fossils help us to study those species which are extinct, by studying their fossils which are found during the digging of earth.
The study of fossils is known as paleontology.
Paleontology helps us in finding the relation between the organisms, that are present and extinct.