Lead is malleable, so it can be pounded into flat sheets without breaking. how does the bonding within lead to explain this property?

metallic bonds involve valence electrons that are removed from one atom and given to another, so the pounding the electrons move.
covalent bonds involve valence electrons that are shared between two metal atoms, so the bonds are strong enough to resist the pounding.
metallic bonds involve many valence electrons shared by many atoms, so the bonds can move around as the metal is pounded.
covalent bonds involve valence electrons that are removed from one atom and given to another, so the pounding the electrons move.