Which Rocks term is correctly associated with common use or association: “widely used as building and decorative stone”, and also with “an intrusive igneous rock”?

Correct Answer: Option D — Granite. Granite is correct because it is widely used as building and decorative stone. Granite is also associated with an intrusive igneous rock. A further identifying fact is that Granite is coarse-grained with visible crystals. Another useful fact is that Granite is associated with widely used as building and decorative stone. Why the other options are incorrect: Option A — Basalt: It is common in oceanic crust and lava plateaus and is associated with an extrusive igneous rock; those are the identifying facts of Basalt. Option B — Pumice: It is used as an abrasive and lightweight aggregate and is associated with a vesicular volcanic rock; those are the identifying facts of Pumice. Option C — Obsidian: It is historically used for sharp cutting tools and is associated with a volcanic glass; those are the identifying facts of Obsidian. Exam Takeaway: Link Granite with “widely used as building and decorative stone” and “an intrusive igneous rock” for quick revision.