(a) Metals are malleable, which means that they can be hammered to form thin sheets. For example, gold and silver.
Metals are ductile, which means that they can be stretched to form thin wires. For example, copper and aluminium.
(b) Gold and copper are two metals that are both malleable and ductile.
(c) Malleability is the property of iron that is utilised to produce iron sheets required for to make buckets.
(d) Ductility is the property of copper that is utilised to make thin wires.