The water cycle shows the continuous movement of water within the Earth and atmosphere. It is a complex system that includes many different processes. Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow.
<em>-</em><em> </em><em>BRAINLIEST</em><em> answerer</em>
I believe the answer is D, but not 100%
The independent variables are the copper and aluminum wires.