Fossils are extremely important in understanding which scientific concept?

#geography #evolution #natural changes 

see what I'm doing I'm giving you a list of concepts fossils help us grasp the concept of 

I feel like your answer should be somethin like> it helps us grasp the concept of animal evolution. it shows us the traces of previous existing species

Idont really understand

The hawk receives 0.1% energy from the caterpillar although the caterpillar gets eaten by another bird smaller than the hawk first