Final answer:
An alloy metal is a mixture containing at least one metal along with one or more other elements which can enhance properties such as strength and durability. Steel is a prime example of an alloy.
Step-by-step explanation:
An alloy metal is a mixture composed of two or more elements, where at least one of the elements is a metal. Alloys can take the form of substitutional or interstitial alloys depending on how the atoms are arranged within the mixture. A well-known alloy is steel which includes a combination of iron and other elements such as carbon, manganese, and chromium to enhance its properties.
Unlike a pure metal comprised of a single element alloys benefit from improved characteristics such as increased hardness, strength malleability,or resistance to corrosion. Therefore the correct answer to what an alloy metal is: b. A metal with one or more elements added to it.