Concept:Aluminium is extracted from its principal ore, bauxite, by electrolysis.
Explanation:The ore bauxite is purified to obtain aluminium oxide,
Al2O3, which is also called alumina.
Aluminium metal is produced by electrolysing this molten alumina.
Cryolite,
Na3AlF6, is added to the alumina to lower its melting point and increase electrical conductivity.
However, cryolite is not the source of aluminium; it only makes the extraction easier.
Duralumin is an alloy of aluminium, and kaolin is a type of clay, so neither serves as the ore.
Therefore, the electrolyte or raw material from which aluminium is extracted is obtained from bauxite.
Answer:A. bauxite