The correct statement about the water cycle is: Energy for the water cycle comes from the sun.
The sun provides the necessary energy for processes such as evaporation and transpiration, which are essential parts of the water cycle. The other statements are incorrect for the reasons below:
- Water does not have a specific starting and ending point in the water cycle; it continuously circulates through various processes (evaporation, condensation, precipitation, etc.).
- Water does change form during the cycle (for example, from liquid to vapor and back).
- Both plants and animals contribute to the water cycle; plants release water vapor through transpiration, and animals contribute through respiration and excretion.