The principal ore of aluminium is bauxite. Bauxite is an aluminium ore that is primarily composed of aluminium oxide, with smaller amounts of iron oxide, silicon dioxide, and other minerals. It is the most important ore of aluminium, accounting for over 90% of the world’s aluminium production. Bauxite is found in tropical and subtropical regions around the world, including Australia, Brazil, China, Guinea, India, Jamaica, and Russia.
Dolomite is a sedimentary rock composed of calcium magnesium carbonate. It is a common rock in the Earth’s crust and is used in a variety of industrial applications, including the manufacture of cement, glass, and ceramics.
Copper is a chemical element with the symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. Copper is one of the most widely used metals in the world, and is a major
component of many electrical and electronic devices.Lignite is a type of coal that is intermediate between peat and bituminous coal. It is a soft, brown coal that is found in swamps and bogs. Lignite is used as a fuel for power plants and as a raw material for the manufacture of chemicals.
Therefore, the correct answer is D. Bauxite.