Tectonic forces is a force where Earth’s plates are moving apart.
A coral island is a type of island formed from coral detritus and associated organic material. They occur in tropical and sub-tropical areas. <span>A group of coral islands, or an atoll, form as underwater volcanoes grow and get closer to the surface, effectively raising the sea floor. Hope this answers the question.</span>
I'm pretty sure the answer is weak central government
hope this helps :D