~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
Answer:
The answer is limestone and corals.
Explanation:
The predominant rock layer south of Lake Okeechobee is composed of limestone created by corals.
Can you put the other options for the question so that I can help?
A relief map shows the elevation of hills, valleys or mountains by shading.
I really do not understand this but i hope you find it