What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Cay, Peninsula, Atoll, Isle, Island, Continent, Archipelago

Plant Earth is unique, due to the presence of life. Water is one of the reasons of life on this planet. Water covers a large part of earth but land is the place used for living and other purposes. Water bodies also hold few pieces of lands, like cay, island and many others.