Explain how the islands and seamounts formed?

Answer 1

it is due to volcano activity with incorporation with tectonic plate movement in undersea..
90% undersea volcano activity reasoned the formation of island and seamounts.
some time its due to earthquake
well sometime it is due to ice bugs . think!!!!

Answer 2

Islands are classified as either oceanic or continental.Oceanic islands rise to the surface from the ocean floor.Continental islands occur where a rise in sea level has drowned a region of continental shelf,leaving higher areas of land separated from the mainland.