Malleability is the property of metals that allows them to be hammered or pressed into thin sheets without breaking. This is why metals like aluminium are used to make foil. Ductility is the ability to be drawn into wires. Sonority refers to the property of producing a ringing sound when struck. Lustre is the shiny appearance of metals. Therefore, malleability is the correct property for making thin sheets. (2 marks = ~50 words)