Final answer:
Stress and strain impact rock deformation by causing changes in volume and shape through various stress types.
Explanation:
Stress is the force exerted per unit area, while strain is the material's response to that force, causing deformation. Rocks can experience tensional, compressional, and shear stress, leading to changes in rock volume, shape, and fracturing. For example, compressional stress thickens rock through folding, while tensional stress stretches and thins rock.
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