Fossils are the key to ancestors. Important evidence for
evolution.
Fossils provide knowledge of animal which lived hundreds of
years ago. Which are now extinct.
Fossils helps to compare animals that lived long ago with
present descendants. They provide the missing link in study of
evolution.
Darwin's theory of evolution is one kind of example. Which says
simpler forms are changed into complex forms with time. In cludes
physical and mental changes.
According to darwin theory of natural selection ' On the origin
of species' book written by Charles darwin in 1859 states that
organisms change overtime as a result of changes in heritable
physical changes or behavioral changes.
Consideration of animal fossils are important for the studies
of evolution.