Verified Answer :

perfectium

Ocean water freezing point: -4°C
Fresh water freezing point (Lake, bottled, river): 0°C

So the answer is ocean water.

keikeikei

answer is ocean water. In a chemical point of view, the amount of salt/solute in water is directly proportional to the lowering of freezing point (called freezing point depression)... same goes with it's boiling point which goes higher (bp elevation) as the amount of dissolved salts/solute increases.

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