Which material is an alloy of copper and tin commonly used for statues, coins, bearings, and underwater fittings?

• A. Bronze
• B. Brass
• C. Tin
• D. Copper

Answer: (A)

Bronze is a copper-tin alloy that becomes harder and more wear-resistant than pure copper, while still being easy to cast and finish. These traits make it ideal for statues, where fine detail and a durable surface matter; for coins, where long wear resistance is important; for bearings, where hardness and good load-bearing capacity reduce wear; and for underwater fittings, where corrosion resistance in seawater is crucial thanks to the tin content forming a protective oxide layer. The other options aren’t copper-tin alloys—brass is copper-zinc, tin is an element, and copper alone is softer—so bronze best fits all the described uses.