Here's a breakdown:

* Unsaturated Zone: This zone is above the water table. It contains air and some water, but the spaces between soil and rock particles are not completely filled with water.

* Saturated Zone: This zone is below the water table. Here, the spaces between soil and rock particles are completely filled with water. This is where groundwater resides.

The water table is the boundary between the unsaturated and saturated zones. It fluctuates based on rainfall, drought, and other factors.