Fossils give evidence about:

(a) Organisms and their paleobiology.

(b)◆ Even the behaviour of an organism can be deduced to some extent by unearthing a site with more than 10,000 skeletons of a dinosaur called Hadrosaurus. 

◆This implies that the dinosaur lived in herds.

(c)Fossils also provide insight into the evolutionary history of animals and plants .