Question

12.15-test prep-water cycle study guide
over 6 billion people on earth use water every day, yet earth’s water supply remains relatively constant. this is because
○ the sea level is rising
○ water exists in 3 phases on earth
○ water is constantly recycled by the hydrologic cycle
○ global warming melts ice to replace water that is used

Explanation:

The question is about why Earth's water supply remains constant despite heavy usage. The hydrologic (water) cycle recycles water through evaporation, condensation, precipitation, etc., so water is constantly reused. The other options (sea level rising, water's 3 phases, global warming melting ice) don't explain the constant supply.

Answer:

water is constantly recycled by the hydrologic cycle