The provided diagram represents how the volcanic island grows over millions of years.
There are nine stages in this process, from the pillow phase of preshield stage to the guyot stage.
At the first stage, at the bottom of the ocean exists an average mound containing lava inside. After a long period of time continually erupting and being cooled down by water, a hyaloclastic protoshield is formed outside the volcano. After that, a small airhole appears on the surface of the ocean as a result of hydro-explosions covered with ash cone. At the subaerial phase, the shield is consolidated and gradually turns into a sturdy postshield. However, under the influence of natural elements like wind, heat and animals, the external coral reefs and sediments becomes eroded and subsided. Then, the island starts the process of rejuvination, forming the lava flows and cinder cone around the crater. On the eroded surface forming at or near sea level develops some lagoons, which bring the island into the coral atoll stage. Finally, at the guyot stage, the island is almost razed under the sea.