Concept:A landform that is nearly encircled by water is called a peninsula.
Explanation:An isthmus is a narrow strip of land that connects two larger land areas, so it does not fit.
A peninsula is land that is almost entirely surrounded by water but remains attached to a larger landmass on one side.
A headland is a raised, narrow point of land that projects into the sea, not almost surrounded.
An island, by contrast, is completely surrounded by water on all sides.
Thus, the term that matches the definition is peninsula.
Answer:B. peninsula