Nails and faucets are made from which mineral?

• A. Aluminum
• B. Tin
• C. Steel
• D. Iron

Answer: (D)

Iron is the mineral these items come from because it’s the metal most commonly used to make durable hardware like nails and plumbing fixtures. Nails are typically steel, which is an alloy of iron with carbon, giving the hardness and strength needed to drive them into wood without bending. Faucets and other fittings often use iron or steel components, or metals like brass, but the base material in these kinds of hardware is still iron or an iron alloy. The other options aren’t the primary minerals used for these purposes: aluminum is lighter and not as strong for nails; tin is mainly used as coating or in alloys and isn’t the main metal for nails or typical faucets; steel isn’t a mineral on its own (it’s an iron-based alloy), whereas iron is the actual mineral.