Which Major Islands and Minerals of the World term is correctly associated with location or primary association: “an important ore of manganese”, and also with “mainly manganese dioxide, MnO2”?

Correct Answer: Option C — Pyrolusite. Pyrolusite is correct because it is an important ore of manganese. Pyrolusite is also associated with mainly manganese dioxide, MnO2. A further identifying fact is that Pyrolusite is an important ore of manganese. Another useful fact is that Pyrolusite is associated with mainly manganese dioxide, MnO2. Why the other options are incorrect: Option A — Gypsum: It is a hydrated calcium sulphate mineral and is associated with used in plaster and cement manufacture; those are the identifying facts of Gypsum. Option B — Mica: It is a sheet silicate mineral group and is associated with valued as an electrical and thermal insulator; those are the identifying facts of Mica. Option D — Greenland: It is located between the Arctic and North Atlantic oceans and is associated with the world's largest island that is not a continent; those are the identifying facts of Greenland. Exam Takeaway: Link Pyrolusite with “an important ore of manganese” and “mainly manganese dioxide, MnO2” for quick revision.