What is defined as a large body of water surrounded by land?

A large body of water surrounded by land is best described as a lake. Lakes are typically larger and deeper than ponds, providing a distinct habitat for various forms of wildlife and plant life. They can vary significantly in size and depth but are generally recognized as significant bodies of freshwater or sometimes saltwater that do not flow like rivers or streams.

In contrast, oceans are vast bodies of saltwater that cover much of the Earth's surface and are not surrounded by land. Rivers are flowing bodies of water that move from higher to lower elevations and are typically bordered by land, but they do not fit the definition of a body of water that is enclosed by land. Ponds, while similarly enclosed by land, are generally smaller and shallower than lakes. Therefore, the characteristics and definitions solidly position lakes as the correct answer.