Hawaiian Islands
An archipelago is an extensive cluster of islands formed tectonically, typically found in the ocean as a result of volcanic or seismic activity along tectonic plate boundaries. Examples include the Hawaiian Islands and the Indonesian Archipelago.
Groups of islands are called "archipelagoes", for example, the Galapagos islands.
An archipelago is a chain or cluster of islands.
Archipelago is understood to mean a collection of islands, so yes the "of islands" part is redundant.
The group could be called an archipelago. An extended line (e.g. from volcanoes) would be an island chain.
A group of islands is known as an archipelago.
An archipelago.
The finches were isolated by island, the many islands of the Galapagos archipelago, their distinctive beaks were adapted to the food available in their given locations, and all descended from a common finch.
An archipelago.
The Canary Islands are an archipelago of islands, off the west coast of Africa.
The noun archipelago is used for an archipelago of islands.