Final answer:
The energy for the water cycle comes from the Sun's warmth, which leads to evaporation and condensation, resulting in precipitation. The correct answer is option 4.
Step-by-step explanation:
The water cycle is driven by the Sun's energy as it warms the oceans and other surface waters. This leads to evaporation (liquid water to water vapor) of liquid surface water and sublimation (ice to water vapor) of frozen water, thus moving large amounts of water into the atmosphere as water vapor. Over time, this water vapor condenses into clouds as liquid or frozen droplets and eventually leads to precipitation (rain, snow, hail), which returns water to Earth's surface.