Here's why:

* Strait: A narrow body of water that connects two larger bodies of water. It essentially acts as a passageway between them.

* Land bridge: A narrow strip of land that connects two larger landmasses. It acts as a barrier between two bodies of water.

Therefore, a strait is a passage for water, while a land bridge is a passage for land. They are two sides of the same coin in terms of geographical features.

Some examples of land bridges include:

* Isthmus of Panama: Connects North and South America.

* Bering Land Bridge: Connected Asia and North America during the last glacial period.

* Suez Isthmus: Connects Africa and Asia.