Explanation: To understand the concept of islands and why Dubai is not an island, we need to first define what an island is. An island is a piece of land that is completely surrounded by water. This definition is crucial in distinguishing between islands and other landforms.
Let's examine each option in detail:
1. **Kawaratti**: This is a small island in the Lakshadweep archipelago, which is a group of islands in the Arabian Sea off the coast of India. Kawaratti is indeed an island because it is surrounded by water on all sides. It is a part of the Indian territory and is one of the many islands that make up the Lakshadweep group.
2. **Australia**: Australia is often referred to as an island due to its isolation in the Southern Hemisphere. However, it is classified as a continent, not an island. A continent is a large landmass that is not surrounded by water on all sides. Australia is surrounded by water, but it is so large and distinct that it is considered a separate continent rather than an island.
3. **Dubai**: Dubai is a city located on the Arabian Peninsula, which is a large landmass that extends into the Arabian Sea. The Arabian Peninsula is connected to the rest of Asia and is not surrounded by water on all sides. Therefore, Dubai, being a part of this larger landmass, is not an island. It is a city situated on the coast of the Arabian Gulf, but it is not surrounded by water on all sides.
4. **Iceland**: Iceland is an island country located in the North Atlantic Ocean. It is completely surrounded by water, making it a true island. It is a separate landmass that is not connected to any other continent or larger landmass.
In conclusion, the correct answer is Dubai because it is not an island. It is a city located on the Arabian Peninsula, which is a large landmass and not an island. Understanding the geographical definitions of islands, continents, and peninsulas is essential to correctly identifying which of the given options is not an island.