Galvanization is used to prevent the rusting of iron.
Explanation: Galvanization is the process of applying a protective layer of zinc onto iron or steel to prevent rusting. The zinc coating acts as a barrier, protecting the iron from corrosion.
Why other options are incorrect:
(b) Zinc:
Galvanization is the process of applying zinc to iron, not the other way around. Zinc is the metal used to protect iron from rust.
(c) Aluminium:
Aluminium is not typically used in the galvanization process. While aluminium can resist corrosion on its own, it’s not the metal used in galvanization to protect iron.
(d) Copper:
Copper is also not used for galvanization. Copper has its own corrosion resistance properties, different from those of zinc.