Discussion
Swimmers can float in Dead sea because :
Answer: D
Swimmers float in the Dead Sea because the increased salt content makes the sea dense.
The Dead Sea has a salinity of about 340 grams per litre, nearly ten times that of the open ocean. The dissolved salt makes the water so dense that the upward buoyant force on a person's body is greater than in ordinary water, so swimmers float easily.
Wind speed, ocean currents and tides have nothing to do with buoyancy; and the Dead Sea is a landlocked salt lake with no ocean currents or appreciable tides at all.
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