A group of islands is called an 'archipelago'.

The statement "A group of islands is called an archipelago" is true because an archipelago refers to a cluster or chain of islands that are situated closely together in a body of water. These islands usually share common geological origins and are often formed as a result of volcanic activity or tectonic shifts. Examples of well-known archipelagos include the Maldives in the Indian Ocean, the Galapagos Islands in the Pacific Ocean, and the Philippines in Southeast Asia. The term "archipelago" is commonly used in geography and refers specifically to islands, making the statement accurate.