Is a durable material and is widely used for casting, which is a process by which the melted meteriel is poured into a mold.
a. bronze
c. copper
b. silver
d. gold

Answer;

Bronze

Bronze is a durable material and is widely used for casting, which is a process by which the melted material is poured into a mold.

Explanation;

Bronze is an alloy of copper which can vary widely in its composition.  It is often used where a material harder than copper is required, where strength and corrosion resistance is required and for ornamental purposes.  The variations in bronze (both in proportion and elemental composition) can significantly affect its weathering characteristics.

Bronze is used in architecture for structural and design elements, for bearings because of its friction properties, and as phosphor bronze in musical instruments, electrical contacts, and ship propellers. Aluminum bronze is used to make machine tools and some bearings.

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.