If we define growth as an increase in body mass, then non-living objects like mountains and sand mounds also grow. How is this growth different from that of living organisms?

1. Non-living growth is temporary, while living growth is always permanent
2. Non-living growth occurs by accumulation of material on the surface
3. Living growth is purely external, while non-living growth is purely internal
4. There is no meaningful difference; both are driven by environmental inputs

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