All the following play important roles in metal
corrosion except

The nature and extent of corrosion depend on the metal and the environment. The important factors which may influence the corrosion process are: a) Nature of the metal, nature of the environment and the corrosion products. b) Temperature. c) Concentration of electrolyte.

Explanation:

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personal, she chose to do it.

the answer is c.the valence of the atoms combine .