Question

4. Which of the following makes the Dead Sea a unique place on Earth?​

Answer 1

Today we feature the Dead Sea, situated between Israel and Jordan, and forming part of the border between the two countries. The Dead Sea is fed mainly by the Jordan River, which enters the lake from the north.
I hope this helps

Answer 2

A { the first answer } The salt water is limited

Explanation: Why? With a salinity of 342 g/kg, or 34.2% (in 2011), it is one of the world's saltiest bodies of water – 9.6 times as salty as the ocean – and has a density of 1.24 kg/litre, which makes swimming similar to floating. This salinity makes for a harsh environment in which plants and animals cannot flourish, hence its name.