What term is used to describe a narrow strip of land that is surrounded by water on three sides?

A peninsula is indeed defined as a narrow strip of land that is surrounded by water on three sides. This geographical feature extends into a body of water, typically an ocean or sea, allowing it to have coastlines on multiple sides. The characteristic of being surrounded by water on three sides is what distinguishes a peninsula from other landforms.

In contrast, a basin refers to a low area that can collect water, while a delta is formed from sediment deposited at the mouth of a river where it meets a larger body of water. An atoll is a ring-shaped coral reef, island, or series of islets, which typically encircle a lagoon either partially or completely. Understanding these definitions helps clarify why the term “peninsula” is the correct choice in this context.