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What does hydrosphere refer to?

  1. The air we breathe

  2. The land

  3. Water

  4. The plants and animals

The correct answer is: Water

The correct answer is C. Water. The hydrosphere refers to all the water on Earth, including water in oceans, rivers, lakes, groundwater, and in the atmosphere as water vapor. Option A, the air we breathe, refers to the atmosphere. Option B, the land, refers to the lithosphere. Option D, the plants and animals, refer to the biosphere.