The fossil record shows a progression of species over time, with older fossils representing simpler organisms and newer fossils showing more complex organisms. This gradual change over millions of years supports the idea of natural selection, as species adapt to their environments and evolve over time to survive. Fossil evidence also demonstrates the extinction of species that were not well-adapted to their changing environments, further confirming the principles of natural selection. Overall, the fossil record provides tangible evidence of the process of evolution through natural selection.
