Why do you get a chain of islands?

Answer 1

Island chains are caused by undersea volcanoes on a fault line. As volcanoes erupt over time, enough igneous rock is deposited to form a mountain peak above water. Multiple undersea mountains along a fault that become high enough to become islands form an island chain.

Answer 2

well, there is a hot spot that exploes making a landform, then the pacific plate caries it away form the hot spot, and this process repets.

Answer 3

Due to volcanic eruptions forming islands along a weakness in a long line of the sea bed, the Hawaiian Island chains was formed.