How have landforms that have been created and shaped over time by physical processes?

They have been shaped by physical weathering.

Explanation:

Physical or mechanical weather is the type of erosion responsible for breaking down rocks without chemical processes. There are many types of physical weathering that affect the landscape in many ways.

Thermal stress makes a rock expand and contract and eventually break. Frost causes cracks in rocks by fracturing them during the formation and melting of water molecules. The Oceans weather coast lines through wave action and salt crystal weathering. In a process known as unloading, rocks formed underground and exposed to the surface can fracture. The weight and power of glacial masses erodes glacial valleys through abrasion.