2 How do submarine volcanoes form? How do you know? (A) Submarine volcanoes are produced by lava flows deep in the ocean. “Most volcanic islands are created by passive lava flows on the seafloor.”
(B) Submarine volcanoes develop after big explosions destroy another nearby island. “After an explosive eruption in 2009, a new landmass formed.”
(C) Submarine volcanoes form from islands that have been worn away. “New lava flows must restore the land that has been worn away.”
(D) Submarine volcanoes begin to grow from tiny organisms. “Life on volcanic islands starts with tiny organisms called bacteria.”