Bending a straw is not a good model for showing the malleability of iron because it is not a metal.
Malleability is property by virtue of which a material can be extended in all directions without rupture by the application of load.
In simpler terms, malleability is a material's ability to be bent, formed, or shaped without cracking or breaking.
Malleability is a unique property of metals and according to this question, iron is malleable because of the type of bond between the atoms.
This suggests that bending a straw is not a good model for showing the malleability of iron because it is not a metal.
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