$\begin{array}{1 1} (a)\; \text{The flow of water underground, in the vadose zone} \\ (b)\; \text{The variety of ways by which water moves across the land} \\(c)\; \text{The flow of water from the ground surface into the ground} \\(d)\; \text{The transformation of water from liquid to gas as it moves from the ground or bodies of water into the overlying atmosphere} \end{array}$
