The driving force for the movement of water in plants is difference in water _______.

A) pressure
B) osmolarity
C) potential
D) temperature
E) pH

Water Potential

Free energy of water; the water potential of pure water is zero and that of solutions is a negative value. Differences in water potential are used to predict the direction of water movement (always from a region of less negative water potential to a region of more negative water potential).