The correct option is (c).
Explanation
Oceans cover approximately 71% of the Earth's surface and are dynamic bodies of water. Their physical and chemical properties, including salinity and movement, are fundamental to planetary geography and climate systems.- Statement 1 is Correct: Oceans are the primary reservoir of the Earth's water and play a critical role in the hydrological cycle. A vast majority of atmospheric moisture is derived from the evaporation of ocean water, which subsequently condenses and precipitates over land and sea.
- Statement 2 is Incorrect: Ocean water is distinctively saline, containing dissolved salts such as sodium chloride. The average salinity of ocean water is approximately 35 parts per thousand. In contrast, inland lakes can be freshwater or saline, but it is factually incorrect to state that ocean water is free from dissolved salts.
- Statement 3 is Correct: Ocean water is rarely static. Its movements are categorized into three main types based on the forces acting upon them:
- Waves: Oscillatory movements generated mainly by wind friction.
- Tides: The periodic rise and fall of sea levels caused by the gravitational attraction of the moon and the sun.
- Currents: The continuous flow of huge masses of water in a definite direction.
Key Takeaway: Oceans are saline water bodies that drive the global hydrological cycle. Their dynamic nature is defined by three primary movements: waves, tides, and ocean currents.