How are fossils evidence of biological evolution

Fossils are important evidence for evolution

Explanation:

because they show that life on earth was once different from life found on earth today. Usually only a portion of an organism is preserved as a fossil, such as body fossils (bones and exoskeletons), trace fossils (feces and footprints), and chemofossils (biochemical signals).

Answer:They are evidence because they show that life was once different on Earth. It shows that many different species also used to be on Earth.