What is a copper alloy that contains tin and sometimes zinc called?

The term for a copper alloy that contains tin and sometimes zinc is bronze. Bronze is known for its strength and resistance to corrosion, which makes it a favorable choice for various applications, including sculptures, tools, and musical instruments. The primary characteristic that distinguishes bronze from other alloys is its composition, where tin is the main alloying element added to copper, enhancing its durability and casting properties.

Other alloys listed, such as brass, contain zinc rather than tin, while white metal typically refers to a range of alloys that do not specifically identify with copper-tin compositions. Babbit is a type of white metal that is primarily used in bearings and has a different composition as well. Thus, the defining features of bronze lie in its unique blend of copper and tin, along with the potential inclusion of zinc, which qualifies it as the correct answer.