~Hello there! ^_^
Your question: What is a group of islands clustered together in a large body of water..?
Your answer: A group of islands clustered together in a large body of water is called an archipelago.
Hope this helps! :D
I think you forgot to give the choices along with this question. I am answering the question based on my research and knowledge and hope that it comes to your help. The Serengeti is the most famous in the Great Plains region of Africa. I hope that this answer has come to your help.
They form when wind blows over the surface of the ocean. Wind energy is transferred to the sea surface. Then, the energy is carried through the water by the waves. This gives waves the energy to erode the shore.