Answer: The main reason for the growth in demand for water is because of population growth
I would say that wind is the top agent of erosion that is assisted by gravity because gravity pulls down the sediments that the wind is eroding.
Enzymes catalyze chemical reactions involving the substrate (s).
Water is the universal solvent; a solvent is what does the dissolving. The corn syrup would be the solute, in other words what gets dissolved.