Give the reason for the following …

a. Gold is used to make jewelry because of the attractiveness of its luster and because of its rarity. It also doesn't tarnish and doesn't react with air the way a metal like iron does. Gold is malleable, which means it can be beaten into very thin sheets. It's also ductile, which means it can be stretched out into thin wire as in the findings of earrings.

b. Different types of wood is used for making furniture (both hardwood and softwood) because of its strength and durability, color, density, grain, and finishing.

c. Glass is used to make window because it is the cheapest material that light passes through readily. The basic function of a window is to allow light into a building.

d. Coins that are intended for circulation have some special requirements based on the conditions they will encounter. For example, a coin may be in circulation for up to 30 years, and so must have excellent wear resistance and anti-corrosion properties. Achieving this goal necessitates the use of base metal alloys.