Option A: Steel is an alloy made of iron and various combinations of metals depending on the job at hand. Carbon steel is dull, vulnerable to corrosion, and is exceptionally strong. These traits make carbon steel ideal for manufacturing knives, high-tension wires, automotive parts, and other similar items. Alloy steel is a mixture of metals like nickel, copper, and aluminum. These tend to be cheaper, more resistant to corrosion, and are used in car parts, pipelines, ship hulls, and mechanical projects. The strength depends on the concentration of the elements it contains. Tool steel is very hard, heat and scrape resistant, and is used to make metal tools like hammers. They are usually made from cobalt, molybdenum, and tungsten. Stainless steel is mainly mixed with chromium which allows the steel to be resistant to corrosion and very easily molded into varying shapes. Stainless steel can be found in surgical equipment, home applications, silverware, and even implemented as exterior cladding for commercial / industrial buildings. What three properties of metallic bonds make them ideal for these jobs