Which Major Islands and Minerals of the World term is correctly associated with important identifying fact: “commonly forms by intense weathering in tropical regions”, and also with “the principal ore of aluminium”?

Correct Answer: Option B — Bauxite. Bauxite is correct because it is commonly forms by intense weathering in tropical regions. Bauxite is also associated with the principal ore of aluminium. A further identifying fact is that Bauxite is commonly forms by intense weathering in tropical regions. Another useful fact is that Bauxite is associated with the principal ore of aluminium. Why the other options are incorrect: Option A — Hematite: It is an iron oxide with the formula Fe2O3 and is associated with an important ore of iron; those are the identifying facts of Hematite. Option C — Chalcopyrite: It is a copper iron sulphide mineral and is associated with a major ore of copper; those are the identifying facts of Chalcopyrite. Option D — Galena: It is a lead sulphide mineral with formula PbS and is associated with the principal ore of lead; those are the identifying facts of Galena. Exam Takeaway: Link Bauxite with “commonly forms by intense weathering in tropical regions” and “the principal ore of aluminium” for quick revision.