A chemical change occurs when a reaction is involved in it, and it changes the composition of the substance (s). Let's check each one of the options.
A. When you make a solution, you're not making any chemical reaction, you're only dissolving a substance into another, without changing the chemistry of any of them.
B. As you can see, a chemical reaction called oxidation or corrosion is taking place, changing the substance's chemistry. Then, this is the right option.
C and D. Those are physical changes of t
