What do palaeontologists study?

Palaeontologists are scientists who study the history of life on Earth by examining fossils. They investigate remains of plants, animals, and other organisms that lived in prehistoric times. By studying these fossils, they can learn about the evolution of species, how ancient life forms lived, and how the Earth’s environment has changed over millions of years. Fossils help palaeontologists understand extinct species and the processes of evolution. Their work provides valuable information about Earth’s biological history.

This question related to Chapter 4 Social Science Class 6th NCERT.
From the Chapter 4. Timeline and Sources of History.
Give answer according to your understanding.