Final answer:
The reaction A + BC → B + AC is a single replacement reaction, where element A replaces B in compound BC, forming new compound AC.
Step-by-step explanation:
The reaction A + BC → B + AC represents a type of chemical reaction known as a single replacement reaction, or single-displacement reaction, where one element replaces another element in a compound. In this reaction, element A replaces element B in the compound BC, resulting in element B being displaced and the formation of a new compound AC. This type of reaction is often easy to predict when you understand the reactivity of the elements involved. It's important to note that for such a reaction to occur, the reacting element (in this case, A) must be more reactive than the element it is replacing (element B).