Geological processes shape natural landscapes through various mechanisms such as erosion, weathering, tectonic activity, volcanic eruptions, and sedimentation. These processes can create features like mountains, valleys, rivers, canyons, and coastlines over millions of years. Erosion, for example, can carve out valleys and canyons, while tectonic activity can uplift mountains and create faults. Volcanic eruptions can form new landforms like volcanic mountains and islands. Sedimentation can also play a role in shaping landscapes by depositing layers of sediment that can eventually form rocks and soil. Overall, geological processes work together to constantly mold and reshape the Earth's surface.