The water cycle starts w/ evaporation. It's a process where water at the surface turns into water vapor. Water absorbs the heat energy from the sun and turns into vapor. Through evaporation, the water moves from hydrosphere to atmosphere. As water evaporates it reduces the temperature of the bodies.<span />
It helps develop the theme because with the teacher being strict Kevin no longer tries to get answers from his father and listens to the teacher and Kevin learns from it.