Final answer:
The described reaction is a single replacement reaction, where aluminum displaces silver, resulting in the formation of silver metal, hydrogen sulfide, and aluminum oxide.
Step-by-step explanation:
The reaction between silver tarnish and aluminum metal in a basic solution results in silver metal, hydrogen sulfide, and aluminum oxide. This is a type of single replacement reaction, where aluminum displaces silver from its compound. The aluminum gets oxidized, while the silver ions are reduced to silver metal. Single-displacement reactions are characterized by one element being replaced by another in a compound.