The archipelago that includes the islands of Java and Sumatra is known as Indonesia. This Southeast Asian nation comprises thousands of islands, making it the largest archipelago in the world. Java, the most populous island, is home to the capital city, Jakarta, while Sumatra is known for its rich biodiversity and natural resources. These islands play a pivotal role in the country’s economy, culture, and tourism. Indonesia's diverse ecosystems, including rainforests and coral reefs, are crucial for ecological balance and attract visitors from around the globe.