What geological feature is associated with the islands of Sumatra, Java, and the Lesser Sunda Islands?

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Volcanic activity is a major feature associated with the islands of Sumatra, Java, and the Lesser Sunda Islands. These islands are situated on the Ring of Fire, which is a volcanic and seismic active region around the Pacific Ocean. These islands have many active and dormant volcanoes, which have led to devastating eruptions and earthquakes in the past.

What Geological Feature Is Associated with the Islands of Sumatra