Explanations:An island is a piece of land that is completely surrounded by water. This definition is fundamental in geography and helps distinguish islands from other landforms. The key characteristic of an island is its isolation by water, which sets it apart from other geographical features such as peninsulas, which are surrounded by water on three sides, or continents, which are large landmasses not surrounded by water on all sides.
Islands can vary greatly in size, from tiny islets to large landmasses like Greenland. They can be found in oceans, seas, and lakes. The formation of islands can occur through various geological processes, such as volcanic activity, tectonic movements, or the erosion of larger landmasses. Some islands are formed by coral reefs, which grow around a submerged volcanic island and eventually create a ring-shaped atoll.
Understanding the definition of an island is crucial for geographical studies and helps in identifying and classifying different landforms. It is important to note that while islands are surrounded by water, other landforms such as plains and plateaus are not. A plain is a large area of flat land with few trees and a gentle slope, while a plateau is an area of highland with a relatively flat top and steep sides. These landforms are typically part of larger landmasses and are not surrounded by water on all sides.
Therefore, the correct answer to the question "Piece of land surrounded by water on all sides" is an island. This definition is consistent with the geographical understanding of islands and helps in distinguishing them from other landforms.