Answer:
Islands are formed by volcanic eruptions and tectonic plates movements.
Step-by-step explanation:
Islands are land masses that are covered with water on all its sides. Islands are mainly formed by the volcanic eruptions or by the tectonic forces. When volcanoes erupt, they try to build up layers of the lava that eventually emerged through the water surface and forms an island.
Islands can be also formed when tectonic plates forces each other beneath the water body and land masses rise up to form islands.
Yes islands can be formed at any time. But it takes time for the formation of an island.
Islands are more likely to occur on the seas, oceans, lakes or river, etc.