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Solution:Concept: Any substance that can be pounded into sheets without breaking is said to be malleable. The ability of the atoms to stack upon one another while maintaining the crystal structure makes the majority of metals bendable.
Greater compressive stress on the metal causes atoms to roll over one another and remain in their new places permanently without rupturing the metallic connections. Because the bonds between metal atoms are non-directional, anytime a metal is stressed, the position of adjacent layers of metallic metal ions varies, allowing atoms to slide over one another while maintaining the same environment for the metal ions.
The metal ions are only transferred from one lattice site to another by the deforming force. The reason why metals are malleable is that they are made up of layers of atoms that can glide over one another.
Hence, option 2 is the correct answer.