Question

when visiting the dead sea you find it really easy to float in the water. why is that possible?
the warm water makes the water more dense
the cool water makes the water less dense
the high salinity makes the water less dense
the high salinity makes the water really dense

Explanation:

According to Archimedes' principle, an object floats when the buoyant force equals its weight. The buoyant force is related to the density of the fluid. The Dead Sea has high salinity, which increases the density of the water. A denser fluid provides a greater buoyant force for a given volume of displaced fluid.

Answer:

The high salinity makes the water really dense.