The correct answer is option 3, the Dead Sea. Salinity refers to the amount of salt dissolved in water. The Dead Sea has the highest salinity among the given options. It is located in the Jordan Rift Valley and is bordered by Jordan to the east and Israel and Palestine to the west. The high salinity in the Dead Sea is mainly due to its unique geographical location, as it is a landlocked lake with no outlet. As water from rivers flows into the Dead Sea, it evaporates quickly, leaving behind a high concentration of salt and minerals. This results in a salinity level of around 34.2%, which is about 9 times saltier than the average seawater salinity. Additionally, the Dead Sea`s salinity levels make it difficult for organisms to survive, hence its name.