Answer the following question: Answer the following question given this paragraph: Steels are a very important class of alloys. The many types of steels are primarily composed of iron, with various amounts of the elements carbon, chromium, manganese, nickel, molybdenum, and boron. Steels are widely used in building construction because of their strength, hardness, and resistance to corrosion. Most large modern structures like skyscrapers and stadiums are supported by a steel skeleton (see Figure below ). Q: What is the primary component of steel alloys? Choices: - carbon - titanium - alluminum - iron A:
Answer:
iron