Why is carbon added to iron? it lowers iron’s boiling point. it makes iron’s lattice structure harder and stronger. it increases iron’s conductivity. it makes iron’s lattice structure more malleable.

Adding carbon to iron to make steel does make it stronger and tougher, up to a point. Then it will get stronger but less tough (ie like cast iron). Carbonstrengthens iron by distorting its crystal latice. This distortion is similar in effect to work hardening.
increases iron’s conductivity.

What are the options? i can you if you give them.