Concept:The water cycle is a continuous movement where water changes forms and circulates between oceans, land, and atmosphere, keeping Earth’s total water volume constant.
Explanation:The water cycle is associated with maintaining the total volume of water because water cannot be created or destroyed on Earth.
It involves processes like evaporation and transpiration, which move water from land and oceans into the atmosphere.
It also includes input (precipitation) and output (evaporation, runoff), balancing the water budget.
Thus, all three statements—maintenance of total volume, processes of evaporation/transpiration, and input/output—are correct.
Answer:D. All of the above
