Earthquakes occur because of the pressure and density.
Answer:
It helps them stay safe from predators, weather, or temperature making sure they survive
Fossils can show structural similarities and differences in organisms over time revealing the vast diversity of life forms that have and continue to exist on Earth.
Comparisons between living organisms and fossils also allow scientists to make inferences about the lines of descent.
I think it’s the first one - a , but I could be wrong