Question

__________ is a durable material and is widely used for casting, which is a process by which the melted material is poured into a mold.
a. bronze \tc. copper
b. silver \td. gold

please select the best answer from the choices provided

○ a
○ b
○ c
○ d

Explanation:

Bronze is an alloy (copper - tin alloy) that is durable. It has been widely used in casting for a long time. Silver is relatively soft compared to bronze in the context of casting for many traditional durable castings. Copper in its pure form has some limitations in terms of hardness for some casting applications where durability is key. Gold is very soft and not typically used for general - purpose durable casting (except for some specialized jewelry or decorative casting where its value is more of a factor than just durability).

Answer:

A. Bronze