Answer:
Fossils and other pieces of geological evidence can be used to draw conclusions about Earth's past by a process known as radiometric dating (which is a process that allows scientists to figure out how old a fossil is). They help in figuring out what the environment looked like at what time, what kind of animals and plants thrived during that era, and what geological landscapes there were back then as well. It helps them conclude quite a lot about major events in the Earth's past, such as Pompeii, a Roman city that was buried under the explosion of the volcano Mount Vesuvius, which told a lot about Roman culture.
Step-by-step explanation:
(Sorry if this wasn't the answer you wanted. You also marked this as an English question, so I got confused.)