Here's a breakdown:
* Piece of land: It's a geographical feature that sticks out into the water.
* Almost entirely surrounded by water: It's mostly bordered by water on three sides.
* Connected to a larger landmass: It's attached to a mainland continent or island.
* Isthmus: The narrow strip of land connecting the peninsula to the mainland.
Think of it like a hand sticking out of a glove - the hand is the peninsula and the glove is the mainland.
Some famous examples of peninsulas include:
* The Iberian Peninsula: Home to Spain and Portugal.
* The Italian Peninsula: Home to Italy.
* The Korean Peninsula: Home to North and South Korea.
* The Florida Peninsula: Located in the southeastern United States.