When a ship enters the sea from a river (1) It rises a little (2) It sinks a little (3) It remains at the same level (4) It rises or sinks depending on the material it is made of
(1) It rises a little Explanation: On average, seawater in the world's oceans has a salinity of about 3.5% (35 g/L, or 599 mM). Seawater is denser than hot fresh water and pure water (density 1.0 g/ml) because the dissolved salts add mass without contributing significantly to the volume.