Concept:Brass is a metallic alloy whose main components are copper and zinc.
Explanation:An alloy is a homogeneous mixture formed by melting two or more metals together.
Brass is created when copper (
Cu) is combined with zinc (
Zn) as the principal alloying metal.
The proportion of zinc can be varied, producing different types of brass with different strength, hardness, and corrosion resistance.
Among the listed metals, nickel, iron, and aluminum do not combine with copper to form brass.
Therefore, the metal commonly alloyed with copper to make brass is zinc.
This explains why brass is widely used for plumbing fittings, musical instruments, and decorative items.
Answer:D. Zinc.