Charles Darwin developed the theory that explains how new species develop based on evidence from many different kinds of scientific inquiry. Darwin’s theory can only be valid if Earth is very old. The scientists who provided evidence for the earth’s old age were most likely

Geologists study Earth’s rocks and landforms, and James Hutton argued that the slow processes shaping Earth today had been occurring for a very long time. This provided evidence for an ancient Earth, giving gradual evolutionary change enough time to produce new species. Therefore, the best choice is geologists such as James Hutton.

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