Final answer:
The most important contribution of geology to human knowledge is Plate Tectonics.
Step-by-step explanation:
Geology's most important contribution to human knowledge is Plate Tectonics. Plate tectonics is integral to the study of geology because it helps reconstruct Earth's history and explains how landforms such as mountains, volcanoes, and ocean basins are created. It also helps us understand the geographic distribution of these features and informs hypotheses for the origin of life.