yes they can be a rock will never turn in to air or water or anything rather then a solid rock is rock as rock
Hardened rocks are not considered to be alive, and living beings (prisoners) break them into smaller rocks, so, yes, they do.
By weathering.
Nothing can, if you try to twist rocks, you just break the rocks to form smaller rocks.
plant roots grow into cracks in rocks
Sediment.
Rocks break apart from force and heat. Water, freezing, thawing, and wind break rocks into smaller portions.
yes
Yes, rocks can break into smaller pieces through processes like weathering and erosion. These smaller pieces can then undergo compaction and cementation to form new rocks through the process of lithification.
Emotional stress
You smash a rock with a bigger rock
Sedimentation
Yes, weathering weakens rocks, sometimes to the point where they break into smaller pieces.