Final answer:
The two changes, silver jewelry tarnishing and bleaching clothes, have oxidation reactions in common.
Step-by-step explanation:
The two changes, silver jewelry tarnishing and bleaching clothes, have the oxidation process in common. Both of these changes are examples of oxidation reactions. In the case of silver jewelry tarnishing, the reaction occurs between the silver and sulfur compounds in the air, forming a dark tarnish on the surface of the jewelry. When clothes are bleached, the active ingredient in the bleach, usually sodium hypochlorite, oxidizes the colored compounds in the clothes, causing them to lose their color. Therefore, the correct answer is B) Oxidation reactions.