What kind of landforms make up Hawaii in the United States and the Falklands in South America?

Archipelago

Explanation:

An archipelago is a group of islands closely scattered in a water thereby forming a landform. Most archipelagos like Hawaii are formed when volcanoes erupt from the ocean floor.

Hawaii is an archipelago comprising of 8 major islands, islets, seamounts and covering a distance of about 1500 miles. The Falklands is an archipelago in the  South Atlantic Ocean on the Patagonian Shelf covering a distance of about about 300 miles.