The answer is the variant C.clouds
I think Elevation zones.. I hope this helps, i didn’t know what you were asking.
The answer is D. Gravity.
Gravity attracts objects to the surface of the Earth. Take a falling brick, for example, the brick has more mass, therefore, there is more attraction between the brick and Gravity. The brick is a solid object and is heavier as well.
Hope this helps! :)
independent variable #3: temperature
dependent variable #3: sales
