Multiple choice

In which of the following regions is the salinity of oceans highest?

  1. Polar region

  2. Tropical region

  3. Sub-tropical region

  4. Equatorial region
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C Correct answer
Explanation

Ocean salinity is highest in sub-tropical regions (around 20°-30° latitude) due to high evaporation rates exceeding precipitation. The equatorial region has lower salinity due to high rainfall, polar regions have low salinity from ice melt, and tropical regions are too broad - the specific maximum is in sub-tropical zones.

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