Why are archipelagos grouped together?
Show answer & explanation
Answer: Volcanic chains or submerged ridge
Ocean currents push islands close — Wrong. Currents don't push islands. Archipelagos cluster because they formed from the same geological process—volcanic hotspots or oceanic ridges.
Volcanic chains or submerged ridge ✓ — Correct! Archipelagos (island groups) form from shared geology. Hawaii: volcanic hotspot creating island chain as plate moves. Philippines/Japan: volcanic arcs above subduction zones. Indonesia: volcanic ring of fire. Or former land bridge now submerged (Florida Keys). Shared origin = clustered location!
Ancient bridges connected them — Wrong. Some archipelagos are former highlands separated by rising seas, but most form from volcanic chains along tectonic features.