Which is a way that paleontologists have contributed to humans' understanding of the history of life?

Paleontologists study fossils to learn what organisms lived in the past and when they lived. By comparing fossils in rock layers, they can group organisms according to the geologic periods in which they existed. The choice about humans living with dinosaurs is incorrect: non-avian dinosaurs went extinct long before humans appeared.

AI-written and checked against the verified answer.